diff --git a/arch/arm/src/arm/up_initialstate.c b/arch/arm/src/arm/up_initialstate.c
index 2ff8cedbf37..8c435c5cde2 100644
--- a/arch/arm/src/arm/up_initialstate.c
+++ b/arch/arm/src/arm/up_initialstate.c
@@ -72,7 +72,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/arm/src/armv6-m/up_initialstate.c b/arch/arm/src/armv6-m/up_initialstate.c
index 1ee31309514..059b9ff453c 100644
--- a/arch/arm/src/armv6-m/up_initialstate.c
+++ b/arch/arm/src/armv6-m/up_initialstate.c
@@ -75,7 +75,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/arm/src/armv7-m/up_initialstate.c b/arch/arm/src/armv7-m/up_initialstate.c
index a6ac40b8eec..19a2121f153 100644
--- a/arch/arm/src/armv7-m/up_initialstate.c
+++ b/arch/arm/src/armv7-m/up_initialstate.c
@@ -64,7 +64,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/arm/src/armv7-r/arm_head.S b/arch/arm/src/armv7-r/arm_head.S
index adb53026a95..090086ae312 100644
--- a/arch/arm/src/armv7-r/arm_head.S
+++ b/arch/arm/src/armv7-r/arm_head.S
@@ -93,7 +93,7 @@
 
 /* Beginning (BOTTOM/BASE) and End+1 (TOP) of the IDLE stack.
  *
- * The IDLE stack is the stack that is used during intialization and,
+ * The IDLE stack is the stack that is used during initialization and,
  * eventually, becomes the stack of the IDLE task when initialization
  * is complete.
  *
diff --git a/arch/arm/src/cxd56xx/cxd56_uart.c b/arch/arm/src/cxd56xx/cxd56_uart.c
index abc9755ea46..116e473a0b2 100644
--- a/arch/arm/src/cxd56xx/cxd56_uart.c
+++ b/arch/arm/src/cxd56xx/cxd56_uart.c
@@ -348,7 +348,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  *   The USART0/2/3 and UART1 peripherals are configured using the following
diff --git a/arch/arm/src/kl/kl_lowputc.c b/arch/arm/src/kl/kl_lowputc.c
index 8dc8f24b129..5d23c8d7ae3 100644
--- a/arch/arm/src/kl/kl_lowputc.c
+++ b/arch/arm/src/kl/kl_lowputc.c
@@ -148,7 +148,7 @@ void kl_lowputc(uint32_t ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/lc823450/lc823450_lowputc.c b/arch/arm/src/lc823450/lc823450_lowputc.c
index e99e4384f18..5e69606636c 100644
--- a/arch/arm/src/lc823450/lc823450_lowputc.c
+++ b/arch/arm/src/lc823450/lc823450_lowputc.c
@@ -179,7 +179,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  **************************************************************************/
diff --git a/arch/arm/src/lc823450/lc823450_rtc.c b/arch/arm/src/lc823450/lc823450_rtc.c
index 7014b65ffdf..987615201df 100644
--- a/arch/arm/src/lc823450/lc823450_rtc.c
+++ b/arch/arm/src/lc823450/lc823450_rtc.c
@@ -282,7 +282,7 @@ static int rtc_interrupt(int irq, void *context, FAR void *arg)
  *   Get the current date and time from the date/time RTC.  This interface
  *   is only supported by the date/time RTC hardware implementation.
  *   It is used to replace the system timer.  It is only used by the RTOS during
- *   intialization to set up the system time when CONFIG_RTC and CONFIG_RTC_DATETIME
+ *   initialization to set up the system time when CONFIG_RTC and CONFIG_RTC_DATETIME
  *   are selected (and CONFIG_RTC_HIRES is not).
  *
  *   NOTE: Some date/time RTC hardware is capability of sub-second accuracy.  That
diff --git a/arch/arm/src/lpc17xx_40xx/lpc17_40_lowputc.c b/arch/arm/src/lpc17xx_40xx/lpc17_40_lowputc.c
index 26915e5717e..166050befed 100644
--- a/arch/arm/src/lpc17xx_40xx/lpc17_40_lowputc.c
+++ b/arch/arm/src/lpc17xx_40xx/lpc17_40_lowputc.c
@@ -286,7 +286,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  *   The UART0/1/2/3 peripherals are configured using the following registers:
diff --git a/arch/arm/src/lpc43xx/lpc43_uart.c b/arch/arm/src/lpc43xx/lpc43_uart.c
index 0924f6b0cb3..766edc99cdb 100644
--- a/arch/arm/src/lpc43xx/lpc43_uart.c
+++ b/arch/arm/src/lpc43xx/lpc43_uart.c
@@ -172,7 +172,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  *   The USART0/2/3 and UART1 peripherals are configured using the following registers:
diff --git a/arch/arm/src/sam34/sam4cm_tickless.c b/arch/arm/src/sam34/sam4cm_tickless.c
index 1c6dca291fd..6194bc89e3b 100644
--- a/arch/arm/src/sam34/sam4cm_tickless.c
+++ b/arch/arm/src/sam34/sam4cm_tickless.c
@@ -40,7 +40,7 @@
  * following custom functions.
  *
  *   void arm_timer_initialize(void): Initializes the timer facilities.  Called
- *     early in the initialization sequence (by up_intialize()).
+ *     early in the initialization sequence (by up_initialize()).
  *   int up_timer_gettime(FAR struct timespec *ts):  Returns the current
  *     time from the platform specific time source.
  *   int up_timer_cancel(void):  Cancels the interval timer.
@@ -210,7 +210,7 @@ static void sam_oneshot_handler(void *arg)
  *
  * Description:
  *   Initializes all platform-specific timer facilities.  This function is
- *   called early in the initialization sequence by up_intialize().
+ *   called early in the initialization sequence by up_initialize().
  *   On return, the current up-time should be available from
  *   up_timer_gettime() and the interval timer is ready for use (but not
  *   actively timing.
diff --git a/arch/arm/src/sam34/sam_lowputc.c b/arch/arm/src/sam34/sam_lowputc.c
index 013901eb387..e0de24cf704 100644
--- a/arch/arm/src/sam34/sam_lowputc.c
+++ b/arch/arm/src/sam34/sam_lowputc.c
@@ -341,7 +341,7 @@ int up_putc(int ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/sama5/sam_can.c b/arch/arm/src/sama5/sam_can.c
index 1a3ac577a82..b6c2a4af71d 100644
--- a/arch/arm/src/sama5/sam_can.c
+++ b/arch/arm/src/sama5/sam_can.c
@@ -1952,7 +1952,7 @@ FAR struct can_dev_s *sam_caninitialize(int port)
       dev->cd_ops       = &g_canops;
       dev->cd_priv      = (FAR void *)priv;
 
-      /* And put the hardware in the intial state */
+      /* And put the hardware in the initial state */
 
       can_reset(dev);
     }
diff --git a/arch/arm/src/sama5/sam_lowputc.c b/arch/arm/src/sama5/sam_lowputc.c
index 484c2417e9c..3ea72de8273 100644
--- a/arch/arm/src/sama5/sam_lowputc.c
+++ b/arch/arm/src/sama5/sam_lowputc.c
@@ -353,7 +353,7 @@ int up_putc(int ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/sama5/sam_tickless.c b/arch/arm/src/sama5/sam_tickless.c
index b3b6d83de36..ff45b99ff66 100644
--- a/arch/arm/src/sama5/sam_tickless.c
+++ b/arch/arm/src/sama5/sam_tickless.c
@@ -40,7 +40,7 @@
  * following custom functions.
  *
  *   void arm_timer_initialize(void): Initializes the timer facilities.  Called
- *     early in the initialization sequence (by up_intialize()).
+ *     early in the initialization sequence (by up_initialize()).
  *   int up_timer_gettime(FAR struct timespec *ts):  Returns the current
  *     time from the platform specific time source.
  *   int up_timer_cancel(void):  Cancels the interval timer.
@@ -222,7 +222,7 @@ static void sam_oneshot_handler(void *arg)
  *
  * Description:
  *   Initializes all platform-specific timer facilities.  This function is
- *   called early in the initialization sequence by up_intialize().
+ *   called early in the initialization sequence by up_initialize().
  *   On return, the current up-time should be available from
  *   up_timer_gettime() and the interval timer is ready for use (but not
  *   actively timing.
diff --git a/arch/arm/src/samv7/sam_lowputc.c b/arch/arm/src/samv7/sam_lowputc.c
index 26345a7835b..3fff6b6b257 100644
--- a/arch/arm/src/samv7/sam_lowputc.c
+++ b/arch/arm/src/samv7/sam_lowputc.c
@@ -246,7 +246,7 @@ int up_putc(int ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/samv7/sam_tickless.c b/arch/arm/src/samv7/sam_tickless.c
index 191a778b477..602002f2bec 100644
--- a/arch/arm/src/samv7/sam_tickless.c
+++ b/arch/arm/src/samv7/sam_tickless.c
@@ -40,7 +40,7 @@
  * following custom functions.
  *
  *   void arm_timer_initialize(void): Initializes the timer facilities.  Called
- *     early in the initialization sequence (by up_intialize()).
+ *     early in the initialization sequence (by up_initialize()).
  *   int up_timer_gettime(FAR struct timespec *ts):  Returns the current
  *     time from the platform specific time source.
  *   int up_timer_cancel(void):  Cancels the interval timer.
@@ -234,7 +234,7 @@ static void sam_oneshot_handler(void *arg)
  *
  * Description:
  *   Initializes all platform-specific timer facilities.  This function is
- *   called early in the initialization sequence by up_intialize().
+ *   called early in the initialization sequence by up_initialize().
  *   On return, the current up-time should be available from
  *   up_timer_gettime() and the interval timer is ready for use (but not
  *   actively timing.
diff --git a/arch/arm/src/stm32/stm32_lowputc.c b/arch/arm/src/stm32/stm32_lowputc.c
index 3c87b6e986f..798cdf1ce1b 100644
--- a/arch/arm/src/stm32/stm32_lowputc.c
+++ b/arch/arm/src/stm32/stm32_lowputc.c
@@ -435,7 +435,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/stm32/stm32_tickless.c b/arch/arm/src/stm32/stm32_tickless.c
index 42579c24a0a..f1db0c45129 100644
--- a/arch/arm/src/stm32/stm32_tickless.c
+++ b/arch/arm/src/stm32/stm32_tickless.c
@@ -42,7 +42,7 @@
  * following custom functions.
  *
  *   void arm_timer_initialize(void): Initializes the timer facilities.
- *     Called early in the initialization sequence (by up_intialize()).
+ *     Called early in the initialization sequence (by up_initialize()).
  *   int up_timer_gettime(FAR struct timespec *ts):  Returns the current
  *     time from the platform specific time source.
  *   int up_timer_cancel(void):  Cancels the interval timer.
@@ -389,7 +389,7 @@ static int stm32_tickless_handler(int irq, void *context, void *arg)
  *
  * Description:
  *   Initializes all platform-specific timer facilities.  This function is
- *   called early in the initialization sequence by up_intialize().
+ *   called early in the initialization sequence by up_initialize().
  *   On return, the current up-time should be available from
  *   up_timer_gettime() and the interval timer is ready for use (but not
  *   actively timing.
diff --git a/arch/arm/src/stm32f0l0g0/stm32_lowputc_v1.c b/arch/arm/src/stm32f0l0g0/stm32_lowputc_v1.c
index 8dd8daa25a8..9b789f7e4c1 100644
--- a/arch/arm/src/stm32f0l0g0/stm32_lowputc_v1.c
+++ b/arch/arm/src/stm32f0l0g0/stm32_lowputc_v1.c
@@ -266,7 +266,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/stm32f0l0g0/stm32_lowputc_v2.c b/arch/arm/src/stm32f0l0g0/stm32_lowputc_v2.c
index 0841e50abd4..34bf2248d95 100644
--- a/arch/arm/src/stm32f0l0g0/stm32_lowputc_v2.c
+++ b/arch/arm/src/stm32f0l0g0/stm32_lowputc_v2.c
@@ -283,7 +283,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/stm32f7/stm32_lowputc.c b/arch/arm/src/stm32f7/stm32_lowputc.c
index 9aefb4295cf..ad6b62e7538 100644
--- a/arch/arm/src/stm32f7/stm32_lowputc.c
+++ b/arch/arm/src/stm32f7/stm32_lowputc.c
@@ -359,7 +359,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/stm32f7/stm32_tickless.c b/arch/arm/src/stm32f7/stm32_tickless.c
index 734a0800a28..bcaba426202 100644
--- a/arch/arm/src/stm32f7/stm32_tickless.c
+++ b/arch/arm/src/stm32f7/stm32_tickless.c
@@ -42,7 +42,7 @@
  * following custom functions.
  *
  *   void arm_timer_initialize(void): Initializes the timer facilities.
- *     Called early in the initialization sequence (by up_intialize()).
+ *     Called early in the initialization sequence (by up_initialize()).
  *   int up_timer_gettime(FAR struct timespec *ts):  Returns the current
  *     time from the platform specific time source.
  *   int up_timer_cancel(void):  Cancels the interval timer.
@@ -402,7 +402,7 @@ static int stm32_tickless_handler(int irq, void *context, void *arg)
  *
  * Description:
  *   Initializes all platform-specific timer facilities.  This function is
- *   called early in the initialization sequence by up_intialize().
+ *   called early in the initialization sequence by up_initialize().
  *   On return, the current up-time should be available from
  *   up_timer_gettime() and the interval timer is ready for use (but not
  *   actively timing.
diff --git a/arch/arm/src/stm32h7/stm32_lowputc.c b/arch/arm/src/stm32h7/stm32_lowputc.c
index 132a936597c..fe7041f2229 100644
--- a/arch/arm/src/stm32h7/stm32_lowputc.c
+++ b/arch/arm/src/stm32h7/stm32_lowputc.c
@@ -359,7 +359,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/stm32l4/stm32l4_lowputc.c b/arch/arm/src/stm32l4/stm32l4_lowputc.c
index 4d6ff260185..43d6cea413a 100644
--- a/arch/arm/src/stm32l4/stm32l4_lowputc.c
+++ b/arch/arm/src/stm32l4/stm32l4_lowputc.c
@@ -306,7 +306,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/stm32l4/stm32l4_tickless.c b/arch/arm/src/stm32l4/stm32l4_tickless.c
index ec83a881072..7518bbdb6a2 100644
--- a/arch/arm/src/stm32l4/stm32l4_tickless.c
+++ b/arch/arm/src/stm32l4/stm32l4_tickless.c
@@ -41,7 +41,7 @@
  * following custom functions.
  *
  *   void arm_timer_initialize(void): Initializes the timer facilities.
- *     Called early in the initialization sequence (by up_intialize()).
+ *     Called early in the initialization sequence (by up_initialize()).
  *   int up_timer_gettime(FAR struct timespec *ts):  Returns the current
  *     time from the platform specific time source.
  *   int up_timer_cancel(void):  Cancels the interval timer.
@@ -167,7 +167,7 @@ static void stm32l4_oneshot_handler(FAR void *arg)
  *
  * Description:
  *   Initializes all platform-specific timer facilities.  This function is
- *   called early in the initialization sequence by up_intialize().
+ *   called early in the initialization sequence by up_initialize().
  *   On return, the current up-time should be available from
  *   up_timer_gettime() and the interval timer is ready for use (but not
  *   actively timing.
diff --git a/arch/arm/src/str71x/str71x_lowputc.c b/arch/arm/src/str71x/str71x_lowputc.c
index aa569d7fd9c..369e45a8b25 100644
--- a/arch/arm/src/str71x/str71x_lowputc.c
+++ b/arch/arm/src/str71x/str71x_lowputc.c
@@ -273,7 +273,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/tiva/common/tiva_lowputc.c b/arch/arm/src/tiva/common/tiva_lowputc.c
index 4f32804f4ad..9a495c87a9c 100644
--- a/arch/arm/src/tiva/common/tiva_lowputc.c
+++ b/arch/arm/src/tiva/common/tiva_lowputc.c
@@ -248,7 +248,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/arm/src/tms570/tms570_lowputc.c b/arch/arm/src/tms570/tms570_lowputc.c
index e9ae4824303..9dfa9349b44 100644
--- a/arch/arm/src/tms570/tms570_lowputc.c
+++ b/arch/arm/src/tms570/tms570_lowputc.c
@@ -246,7 +246,7 @@ int up_putc(int ch)
  *
  * Description:
  *   This performs basic initialization of the SCI used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/avr/src/at32uc3/at32uc3_lowinit.c b/arch/avr/src/at32uc3/at32uc3_lowinit.c
index 3f11a8755e2..eaa1cc82880 100644
--- a/arch/avr/src/at32uc3/at32uc3_lowinit.c
+++ b/arch/avr/src/at32uc3/at32uc3_lowinit.c
@@ -76,7 +76,7 @@
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/avr/src/at90usb/at90usb_lowinit.c b/arch/avr/src/at90usb/at90usb_lowinit.c
index 9a416f56800..658f2f19c24 100644
--- a/arch/avr/src/at90usb/at90usb_lowinit.c
+++ b/arch/avr/src/at90usb/at90usb_lowinit.c
@@ -115,7 +115,7 @@ static inline void up_wdtinit(void)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/avr/src/atmega/atmega_lowinit.c b/arch/avr/src/atmega/atmega_lowinit.c
index 50cf88f8888..af03d8e1a2f 100644
--- a/arch/avr/src/atmega/atmega_lowinit.c
+++ b/arch/avr/src/atmega/atmega_lowinit.c
@@ -115,7 +115,7 @@ static inline void up_wdtinit(void)
  *
  * Description:
  *   This performs basic initialization of the USART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/avr/src/avr/up_initialstate.c b/arch/avr/src/avr/up_initialstate.c
index 057054d437a..6780866a9e8 100644
--- a/arch/avr/src/avr/up_initialstate.c
+++ b/arch/avr/src/avr/up_initialstate.c
@@ -62,7 +62,7 @@
  *   function is called to initialize the processor specific portions of the
  *   new TCB.
  *
- *   This function must setup the intial architecture registers and/or stack
+ *   This function must setup the initial architecture registers and/or stack
  *   so that execution will begin at tcb->start  on the next context switch.
  *
  ****************************************************************************/
diff --git a/arch/avr/src/avr32/up_initialstate.c b/arch/avr/src/avr32/up_initialstate.c
index 641d6278bda..094370ed60c 100644
--- a/arch/avr/src/avr32/up_initialstate.c
+++ b/arch/avr/src/avr32/up_initialstate.c
@@ -72,7 +72,7 @@
  *   function is called to initialize the processor specific portions of the
  *   new TCB.
  *
- *   This function must setup the intial architecture registers and/or stack
+ *   This function must setup the initial architecture registers and/or stack
  *   so that execution will begin at tcb->start  on the next context switch.
  *
  ****************************************************************************/
diff --git a/arch/hc/src/m9s12/m9s12_initialstate.c b/arch/hc/src/m9s12/m9s12_initialstate.c
index 678b26c902d..e36dc9298cf 100644
--- a/arch/hc/src/m9s12/m9s12_initialstate.c
+++ b/arch/hc/src/m9s12/m9s12_initialstate.c
@@ -70,7 +70,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/mips/src/mips32/up_initialstate.c b/arch/mips/src/mips32/up_initialstate.c
index ba7dda84dd1..9ed793983b6 100644
--- a/arch/mips/src/mips32/up_initialstate.c
+++ b/arch/mips/src/mips32/up_initialstate.c
@@ -62,7 +62,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/misoc/src/lm32/lm32_initialstate.c b/arch/misoc/src/lm32/lm32_initialstate.c
index f46d2aaf07b..f76c82e6ea3 100644
--- a/arch/misoc/src/lm32/lm32_initialstate.c
+++ b/arch/misoc/src/lm32/lm32_initialstate.c
@@ -73,7 +73,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/misoc/src/minerva/minerva_initialstate.c b/arch/misoc/src/minerva/minerva_initialstate.c
index 55b4c27603a..b4ae0974967 100644
--- a/arch/misoc/src/minerva/minerva_initialstate.c
+++ b/arch/misoc/src/minerva/minerva_initialstate.c
@@ -64,7 +64,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/or1k/src/common/up_initialstate.c b/arch/or1k/src/common/up_initialstate.c
index 10fc4c7a5fe..8754b3f0138 100644
--- a/arch/or1k/src/common/up_initialstate.c
+++ b/arch/or1k/src/common/up_initialstate.c
@@ -62,7 +62,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/renesas/src/m16c/m16c_initialstate.c b/arch/renesas/src/m16c/m16c_initialstate.c
index 0ed71b1cd2e..ac64f957f07 100644
--- a/arch/renesas/src/m16c/m16c_initialstate.c
+++ b/arch/renesas/src/m16c/m16c_initialstate.c
@@ -60,7 +60,7 @@
  *   function is called to initialize the processor specific portions of the
  *   new TCB.
  *
- *   This function must setup the intial architecture registers and/or stack
+ *   This function must setup the initial architecture registers and/or stack
  *   so that execution will begin at tcb->start on the next context switch.
  *
  ****************************************************************************/
diff --git a/arch/renesas/src/m16c/m16c_lowputc.c b/arch/renesas/src/m16c/m16c_lowputc.c
index b0d37554e1f..99dc18bbf06 100644
--- a/arch/renesas/src/m16c/m16c_lowputc.c
+++ b/arch/renesas/src/m16c/m16c_lowputc.c
@@ -213,7 +213,7 @@ static inline int up_txready(void)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
@@ -318,7 +318,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/renesas/src/sh1/sh1_initialstate.c b/arch/renesas/src/sh1/sh1_initialstate.c
index 0575b0300f6..552db9f7215 100644
--- a/arch/renesas/src/sh1/sh1_initialstate.c
+++ b/arch/renesas/src/sh1/sh1_initialstate.c
@@ -86,7 +86,7 @@ static inline irqstate_t up_getsr(void)
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/renesas/src/sh1/sh1_lowputc.c b/arch/renesas/src/sh1/sh1_lowputc.c
index b04612b7024..372ea6f46e8 100644
--- a/arch/renesas/src/sh1/sh1_lowputc.c
+++ b/arch/renesas/src/sh1/sh1_lowputc.c
@@ -220,7 +220,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  ****************************************************************************/
diff --git a/arch/risc-v/src/nr5m100/nr5_lowputc.c b/arch/risc-v/src/nr5m100/nr5_lowputc.c
index 87a665be517..effafb04da5 100644
--- a/arch/risc-v/src/nr5m100/nr5_lowputc.c
+++ b/arch/risc-v/src/nr5m100/nr5_lowputc.c
@@ -149,7 +149,7 @@ void up_lowputc(char ch)
  *
  * Description:
  *   This performs basic initialization of the UART used for the serial
- *   console.  Its purpose is to get the console output availabe as soon
+ *   console.  Its purpose is to get the console output available as soon
  *   as possible.
  *
  **************************************************************************/
diff --git a/arch/risc-v/src/rv32im/up_initialstate.c b/arch/risc-v/src/rv32im/up_initialstate.c
index 939383062bc..c203889b169 100644
--- a/arch/risc-v/src/rv32im/up_initialstate.c
+++ b/arch/risc-v/src/rv32im/up_initialstate.c
@@ -61,7 +61,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/sim/src/up_initialstate.c b/arch/sim/src/up_initialstate.c
index 2f879faccfe..e279e3c476c 100644
--- a/arch/sim/src/up_initialstate.c
+++ b/arch/sim/src/up_initialstate.c
@@ -58,7 +58,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/sim/src/up_tickless.c b/arch/sim/src/up_tickless.c
index f7db3a82038..45e6874a773 100644
--- a/arch/sim/src/up_tickless.c
+++ b/arch/sim/src/up_tickless.c
@@ -40,7 +40,7 @@
  * following custom functions.
  *
  *   void sim_timer_initialize(void): Initializes the timer facilities.  Called
- *     early in the intialization sequence (by up_intialize()).
+ *     early in the initialization sequence (by up_initialize()).
  *   int up_timer_gettime(FAR struct timespec *ts):  Returns the current
  *     time from the platform specific time source.
  *   int up_timer_cancel(void):  Cancels the interval timer.
@@ -100,7 +100,7 @@ static bool g_timer_active;
  *
  * Description:
  *   Initializes all platform-specific timer facilities.  This function is
- *   called early in the initialization sequence by up_intialize().
+ *   called early in the initialization sequence by up_initialize().
  *   On return, the current up-time should be available from
  *   up_timer_gettime() and the interval timer is ready for use (but not
  *   actively timing.
diff --git a/arch/sim/src/up_touchscreen.c b/arch/sim/src/up_touchscreen.c
index ab13353202e..3b1cf7c2cb0 100644
--- a/arch/sim/src/up_touchscreen.c
+++ b/arch/sim/src/up_touchscreen.c
@@ -193,9 +193,9 @@ static void up_notify(FAR struct up_dev_s *priv)
       nxsem_post(&priv->waitsem);
     }
 
-  /* If there are threads waiting on poll() for touchscreen data to become availabe,
+  /* If there are threads waiting on poll() for touchscreen data to become available,
    * then wake them up now.  NOTE: we wake up all waiting threads because we
-   * do not know that they are going to do.  If they all try to read the data,
+   * do not know what they are going to do.  If they all try to read the data,
    * then some make end up blocking after all.
    */
 
diff --git a/arch/x86/src/i486/up_initialstate.c b/arch/x86/src/i486/up_initialstate.c
index 242545330aa..5c3b3e8e75a 100644
--- a/arch/x86/src/i486/up_initialstate.c
+++ b/arch/x86/src/i486/up_initialstate.c
@@ -72,7 +72,7 @@
  *   function is called to initialize the processor specific portions of the
  *   new TCB.
  *
- *   This function must setup the intial architecture registers and/or stack
+ *   This function must setup the initial architecture registers and/or stack
  *   so that execution will begin at tcb->start on the next context switch.
  *
  ****************************************************************************/
diff --git a/arch/xtensa/src/common/xtensa_initialstate.c b/arch/xtensa/src/common/xtensa_initialstate.c
index b8e14e51612..be63bb90ec1 100644
--- a/arch/xtensa/src/common/xtensa_initialstate.c
+++ b/arch/xtensa/src/common/xtensa_initialstate.c
@@ -64,7 +64,7 @@
  *   function is called to initialize the processor specific portions of the
  *   new TCB.
  *
- *   This function must setup the intial architecture registers and/or stack
+ *   This function must setup the initial architecture registers and/or stack
  *   so that execution will begin at tcb->start on the next context switch.
  *
  ****************************************************************************/
diff --git a/arch/z16/src/common/up_initialstate.c b/arch/z16/src/common/up_initialstate.c
index afae71b2138..d531670fb3b 100644
--- a/arch/z16/src/common/up_initialstate.c
+++ b/arch/z16/src/common/up_initialstate.c
@@ -58,7 +58,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/z80/src/ez80/ez80_initialstate.c b/arch/z80/src/ez80/ez80_initialstate.c
index 6f28acaed4e..228ac944e07 100644
--- a/arch/z80/src/ez80/ez80_initialstate.c
+++ b/arch/z80/src/ez80/ez80_initialstate.c
@@ -59,7 +59,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/arch/z80/src/z8/z8_initialstate.c b/arch/z80/src/z8/z8_initialstate.c
index 962043fc42b..342bcf4d3ce 100644
--- a/arch/z80/src/z8/z8_initialstate.c
+++ b/arch/z80/src/z8/z8_initialstate.c
@@ -72,7 +72,7 @@
  *   has been created. This function is called to initialize
  *   the processor specific portions of the new TCB.
  *
- *   This function must setup the intial architecture registers
+ *   This function must setup the initial architecture registers
  *   and/or  stack so that execution will begin at tcb->start
  *   on the next context switch.
  *
diff --git a/configs/b-l475e-iot01a/src/b-l475e-iot01a.h b/configs/b-l475e-iot01a/src/b-l475e-iot01a.h
index 3e3d45a5011..9d6dd76a595 100644
--- a/configs/b-l475e-iot01a/src/b-l475e-iot01a.h
+++ b/configs/b-l475e-iot01a/src/b-l475e-iot01a.h
@@ -145,7 +145,7 @@
  * Name: stm32l4_bringup
  *
  * Description:
- *   Called either by board_intialize() if CONFIG_BOARD_LATE_INITIALIZE or by
+ *   Called either by board_initialize() if CONFIG_BOARD_LATE_INITIALIZE or by
  *   board_app_initialize if CONFIG_LIB_BOARDCTL is selected.  This function
  *   initializes and configures all on-board features appropriate for the
  *   selected configuration.
diff --git a/configs/b-l475e-iot01a/src/stm32_bringup.c b/configs/b-l475e-iot01a/src/stm32_bringup.c
index b258e67d70a..221c9195562 100644
--- a/configs/b-l475e-iot01a/src/stm32_bringup.c
+++ b/configs/b-l475e-iot01a/src/stm32_bringup.c
@@ -65,7 +65,7 @@
  * Name: stm32l4_bringup
  *
  * Description:
- *   Called either by board_intialize() if CONFIG_BOARD_LATE_INITIALIZE or by
+ *   Called either by board_initialize() if CONFIG_BOARD_LATE_INITIALIZE or by
  *   board_app_initialize if CONFIG_LIB_BOARDCTL is selected.  This function
  *   initializes and configures all on-board features appropriate for the
  *   selected configuration.
diff --git a/configs/ea3131/src/ea3131.h b/configs/ea3131/src/ea3131.h
index 3a0698ef8a9..ebb1433490a 100644
--- a/configs/ea3131/src/ea3131.h
+++ b/configs/ea3131/src/ea3131.h
@@ -90,14 +90,14 @@ void lpc31_meminitialize(void);
 #endif
 
 /************************************************************************************
- * Name: lpc31_spidev_intialize
+ * Name: lpc31_spidev_initialize
  *
  * Description:
  *   Called to configure SPI chip select GPIO pins for the EA3131 board.
  *
  ************************************************************************************/
 
-void weak_function lpc31_spidev_intialize(void);
+void weak_function lpc31_spidev_initialize(void);
 
 /************************************************************************************
  * Name: lpc31_usbdev_initialize
diff --git a/configs/ea3131/src/lpc31_boot.c b/configs/ea3131/src/lpc31_boot.c
index 1b48f190905..36b5969d1fe 100644
--- a/configs/ea3131/src/lpc31_boot.c
+++ b/configs/ea3131/src/lpc31_boot.c
@@ -80,13 +80,13 @@ void lpc31_boardinitialize(void)
 #endif
 
   /* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
-   * lpc31_spidev_intialize() has been brought into the link.
+   * lpc31_spidev_initialize() has been brought into the link.
    */
 
 #if defined(CONFIG_LPC31_SPI)
-  if (lpc31_spidev_intialize)
+  if (lpc31_spidev_initialize)
     {
-      lpc31_spidev_intialize();
+      lpc31_spidev_initialize();
     }
 #endif
 
diff --git a/configs/ea3131/src/lpc31_fillpage.c b/configs/ea3131/src/lpc31_fillpage.c
index 1e39df1b354..9e92dcf9c4b 100644
--- a/configs/ea3131/src/lpc31_fillpage.c
+++ b/configs/ea3131/src/lpc31_fillpage.c
@@ -508,7 +508,7 @@ void weak_function lpc31_pginitialize(void)
    *
    * - Initialize and configure a mass storage device to support on-demand paging.
    *   This might be, perhaps an SD card or NAND memory.  An SPI FLASH would probably
-   *   already have been configured by lpc31_spidev_intialize(void);
+   *   already have been configured by lpc31_spidev_initialize(void);
    * - Set up resources to support up_fillpage() operation.  For example, perhaps the
    *   the text image is stored in a named binary file.  In this case, the virtual
    *   text addresses might map to offsets into that file.
diff --git a/configs/ea3131/src/lpc31_spi.c b/configs/ea3131/src/lpc31_spi.c
index b476b11ea9e..036575563e0 100644
--- a/configs/ea3131/src/lpc31_spi.c
+++ b/configs/ea3131/src/lpc31_spi.c
@@ -60,14 +60,14 @@
  ************************************************************************************/
 
 /************************************************************************************
- * Name: lpc31_spidev_intialize
+ * Name: lpc31_spidev_initialize
  *
  * Description:
  *   Called to configure SPI chip select GPIO pins for the EA3131 board.
  *
  ************************************************************************************/
 
-void weak_function lpc31_spidev_intialize(void)
+void weak_function lpc31_spidev_initialize(void)
 {
   /* NOTE: Clocking for SPI has already been provided. Pin configuration is performed
    * on-the-fly, so no additional setup is required.
diff --git a/configs/ea3152/src/ea3152.h b/configs/ea3152/src/ea3152.h
index dc668830023..fb631809acc 100644
--- a/configs/ea3152/src/ea3152.h
+++ b/configs/ea3152/src/ea3152.h
@@ -90,14 +90,14 @@ void lpc31_meminitialize(void);
 #endif
 
 /************************************************************************************
- * Name: lpc31_spidev_intialize
+ * Name: lpc31_spidev_initialize
  *
  * Description:
  *   Called to configure SPI chip select GPIO pins for the EA3152 board.
  *
  ************************************************************************************/
 
-void weak_function lpc31_spidev_intialize(void);
+void weak_function lpc31_spidev_initialize(void);
 
 /************************************************************************************
  * Name: lpc31_usbinitialize
diff --git a/configs/ea3152/src/lpc31_boot.c b/configs/ea3152/src/lpc31_boot.c
index 4d972e9ad33..fecec4c039b 100644
--- a/configs/ea3152/src/lpc31_boot.c
+++ b/configs/ea3152/src/lpc31_boot.c
@@ -80,13 +80,13 @@ void lpc31_boardinitialize(void)
 #endif
 
   /* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
-   * lpc31_spidev_intialize() has been brought into the link.
+   * lpc31_spidev_initialize() has been brought into the link.
    */
 
 #if defined(CONFIG_LPC31_SPI)
-  if (lpc31_spidev_intialize)
+  if (lpc31_spidev_initialize)
     {
-      lpc31_spidev_intialize();
+      lpc31_spidev_initialize();
     }
 #endif
 
diff --git a/configs/ea3152/src/lpc31_fillpage.c b/configs/ea3152/src/lpc31_fillpage.c
index c5943a92525..b5afce1a1f5 100644
--- a/configs/ea3152/src/lpc31_fillpage.c
+++ b/configs/ea3152/src/lpc31_fillpage.c
@@ -507,7 +507,7 @@ void weak_function lpc31_pginitialize(void)
    *
    * - Initialize and configure a mass storage device to support on-demand paging.
    *   This might be, perhaps an SD card or NAND memory.  An SPI FLASH would probably
-   *   already have been configured by lpc31_spidev_intialize(void);
+   *   already have been configured by lpc31_spidev_initialize(void);
    * - Set up resources to support up_fillpage() operation.  For example, perhaps the
    *   the text image is stored in a named binary file.  In this case, the virtual
    *   text addresses might map to offsets into that file.
diff --git a/configs/ea3152/src/lpc31_spi.c b/configs/ea3152/src/lpc31_spi.c
index 02bf6a71fce..bdca2890522 100644
--- a/configs/ea3152/src/lpc31_spi.c
+++ b/configs/ea3152/src/lpc31_spi.c
@@ -60,14 +60,14 @@
  ************************************************************************************/
 
 /************************************************************************************
- * Name: lpc31_spidev_intialize
+ * Name: lpc31_spidev_initialize
  *
  * Description:
  *   Called to configure SPI chip select GPIO pins for the EA3152 board.
  *
  ************************************************************************************/
 
-void weak_function lpc31_spidev_intialize(void)
+void weak_function lpc31_spidev_initialize(void)
 {
   /* NOTE: Clocking for SPI has already been provided. Pin configuration is performed
    * on-the-fly, so no additional setup is required.
diff --git a/configs/esp32-core/README.txt b/configs/esp32-core/README.txt
index 5afceec459a..63895c0226d 100644
--- a/configs/esp32-core/README.txt
+++ b/configs/esp32-core/README.txt
@@ -703,7 +703,7 @@ Things to Do
 
   1. There is no support for an interrupt stack yet.
 
-  2. There is no clock intialization logic in place.  This depends on logic in
+  2. There is no clock initialization logic in place.  This depends on logic in
      Expressif libriaries.  The board comes up using that basic 40 Mhz crystal
      for clocking.  Getting to 80 MHz will require clocking initialization in
      esp32_clockconfig.c.
diff --git a/configs/lpcxpresso-lpc1768/README.txt b/configs/lpcxpresso-lpc1768/README.txt
index 6dc54cf5d38..648735519e7 100644
--- a/configs/lpcxpresso-lpc1768/README.txt
+++ b/configs/lpcxpresso-lpc1768/README.txt
@@ -358,7 +358,7 @@ LEDs
 
     Stuck in the OFF state suggests that that the system never completed
     initialization;  Stuck in the ON state would indicated that the system
-    intialialized, but is not takint interrupts.
+    initialized, but is not taking interrupts.
 
   - If a fatal assertion or a fatal unhandled exception occurs, the LED will flash
     strongly as a slow, 2Hz rate.
diff --git a/configs/olimex-lpc-h3131/src/lpc31_boot.c b/configs/olimex-lpc-h3131/src/lpc31_boot.c
index 8db90d9f948..47249403783 100644
--- a/configs/olimex-lpc-h3131/src/lpc31_boot.c
+++ b/configs/olimex-lpc-h3131/src/lpc31_boot.c
@@ -80,13 +80,13 @@ void lpc31_boardinitialize(void)
 #endif
 
   /* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
-   * lpc31_spidev_intialize() has been brought into the link.
+   * lpc31_spidev_initialize() has been brought into the link.
    */
 
 #if defined(CONFIG_LPC31_SPI)
-  if (lpc31_spidev_intialize)
+  if (lpc31_spidev_initialize)
     {
-      lpc31_spidev_intialize();
+      lpc31_spidev_initialize();
     }
 #endif
 
diff --git a/configs/olimex-lpc-h3131/src/lpc31_spi.c b/configs/olimex-lpc-h3131/src/lpc31_spi.c
index d9b08ed3bd3..32b60446045 100644
--- a/configs/olimex-lpc-h3131/src/lpc31_spi.c
+++ b/configs/olimex-lpc-h3131/src/lpc31_spi.c
@@ -60,14 +60,14 @@
  ************************************************************************************/
 
 /************************************************************************************
- * Name: lpc31_spidev_intialize
+ * Name: lpc31_spidev_initialize
  *
  * Description:
  *   Called to configure SPI chip select GPIO pins for the LPC-H3131 board.
  *
  ************************************************************************************/
 
-void weak_function lpc31_spidev_intialize(void)
+void weak_function lpc31_spidev_initialize(void)
 {
   /* NOTE: Clocking for SPI has already been provided. Pin configuration is performed
    * on-the-fly, so no additional setup is required.
diff --git a/configs/olimex-lpc-h3131/src/lpc_h3131.h b/configs/olimex-lpc-h3131/src/lpc_h3131.h
index 8285b7e0516..ce1f5d379b8 100644
--- a/configs/olimex-lpc-h3131/src/lpc_h3131.h
+++ b/configs/olimex-lpc-h3131/src/lpc_h3131.h
@@ -145,14 +145,14 @@ void lpc31_meminitialize(void);
 #endif
 
 /************************************************************************************
- * Name: lpc31_spidev_intialize
+ * Name: lpc31_spidev_initialize
  *
  * Description:
  *   Called to configure SPI chip select GPIO pins for the LPC-H3131 board.
  *
  ************************************************************************************/
 
-void weak_function lpc31_spidev_intialize(void);
+void weak_function lpc31_spidev_initialize(void);
 
 /************************************************************************************
  * Name: lpc31_usbdev_initialize
diff --git a/configs/olimexino-stm32/src/olimexino-stm32.h b/configs/olimexino-stm32/src/olimexino-stm32.h
index c3383eb8a2f..5dee31662d6 100644
--- a/configs/olimexino-stm32/src/olimexino-stm32.h
+++ b/configs/olimexino-stm32/src/olimexino-stm32.h
@@ -182,7 +182,7 @@ void stm32_usb_set_pwr_callback(xcpt_t pwr_changed_handler);
  *
  *   NOTE: In most architectures, LED initialization() is called from
  *   board-specific initialization and should, therefore, have the name
- *   <arch>_led_intialize().  But there are a few architectures where the
+ *   <arch>_led_initialize().  But there are a few architectures where the
  *   LED initialization function is still called from common chip
  *   architecture logic.  This interface is not, however, a common board
  *   interface in any event and the name board_led_initialization is
diff --git a/configs/photon/src/photon.h b/configs/photon/src/photon.h
index d301a035e21..cd1ff963c4e 100644
--- a/configs/photon/src/photon.h
+++ b/configs/photon/src/photon.h
@@ -93,7 +93,7 @@
  * Name: stm32_bringup
  *
  * Description:
- *   Called either by board_intialize() if CONFIG_BOARD_LATE_INITIALIZE or by
+ *   Called either by board_initialize() if CONFIG_BOARD_LATE_INITIALIZE or by
  *   board_app_initialize if CONFIG_LIB_BOARDCTL is selected.  This function
  *   initializes and configures all on-board features appropriate for the
  *   selected configuration.
diff --git a/configs/photon/src/stm32_bringup.c b/configs/photon/src/stm32_bringup.c
index 9abc75b3759..89b34b51b8a 100644
--- a/configs/photon/src/stm32_bringup.c
+++ b/configs/photon/src/stm32_bringup.c
@@ -60,7 +60,7 @@
  * Name: stm32_bringup
  *
  * Description:
- *   Called either by board_intialize() if CONFIG_BOARD_LATE_INITIALIZE or by
+ *   Called either by board_initialize() if CONFIG_BOARD_LATE_INITIALIZE or by
  *   board_app_initialize if CONFIG_LIB_BOARDCTL is selected.  This function
  *   initializes and configures all on-board features appropriate for the
  *   selected configuration.
diff --git a/configs/skp16c26/README.txt b/configs/skp16c26/README.txt
index 271924dc385..c8a451dfcb9 100644
--- a/configs/skp16c26/README.txt
+++ b/configs/skp16c26/README.txt
@@ -105,7 +105,7 @@ Cygwin GCC BUILD NOTES
    GCC is built twice.  First a initial, "bootstap" GCC is produced in
    toolchain_build_m32c/gcc-4.2.4-initial, then the final GCC is produced in
    toolchain_build_m32c/gcc-4.2.4-final.  The above error will occur twice:  Once for
-   the intial GCC build (see above) and once for the final GCC build. For the final GCC
+   the initial GCC build (see above) and once for the final GCC build. For the final GCC
    build, the workaround is the same except that the directory will be
    toolchain_build_m32c/gcc-4.2.4-final/gcc.
 
diff --git a/configs/zkit-arm-1769/README.txt b/configs/zkit-arm-1769/README.txt
index f975c11767f..dc5b2ee30a3 100644
--- a/configs/zkit-arm-1769/README.txt
+++ b/configs/zkit-arm-1769/README.txt
@@ -169,7 +169,9 @@ LEDs
 
     Stuck in the OFF state suggests that that the system never completed
     initialization;  Stuck in the ON state would indicated that the system
-    intialialized, but is not takint interrupts.
+    initialized, but is not taking interrupts.
+
+
 
   - If a fatal assertion or a fatal unhandled exception occurs, the LED will flash
     strongly as a slow, 2Hz rate.
diff --git a/drivers/syslog/README.txt b/drivers/syslog/README.txt
index 93cd1709f8f..346cc632557 100644
--- a/drivers/syslog/README.txt
+++ b/drivers/syslog/README.txt
@@ -182,7 +182,7 @@ SYSLOG Channels
       bucket until the SYSLOG channel device has been initialized.
 
   The syslog channel device is initialized when the bring-up logic calls
-  syslog_intialize():
+  syslog_initialize():
 
   syslog_initialize()
   -------------------
diff --git a/drivers/syslog/syslog.h b/drivers/syslog/syslog.h
index 909ebdcd0ec..e37a3db3834 100644
--- a/drivers/syslog/syslog.h
+++ b/drivers/syslog/syslog.h
@@ -82,7 +82,7 @@ EXTERN FAR const struct syslog_channel_s *g_syslog_channel;
  *
  *   One power up, the SYSLOG facility is non-existent or limited to very
  *   low-level output.  This function may be called later in the
- *   intialization sequence after full driver support has been initialized.
+ *   initialization sequence after full driver support has been initialized.
  *   (via syslog_initialize())  It installs the configured SYSLOG drivers
  *   and enables full SYSLOGing capability.
  *
diff --git a/drivers/syslog/syslog_device.c b/drivers/syslog/syslog_device.c
index a239993114a..17250e8e539 100644
--- a/drivers/syslog/syslog_device.c
+++ b/drivers/syslog/syslog_device.c
@@ -303,7 +303,7 @@ static int syslog_dev_outputready(void)
  *
  *   One power up, the SYSLOG facility is non-existent or limited to very
  *   low-level output.  This function may be called later in the
- *   intialization sequence after full driver support has been initialized.
+ *   initialization sequence after full driver support has been initialized.
  *   (via syslog_initialize())  It installs the configured SYSLOG drivers
  *   and enables full SYSLOGing capability.
  *
diff --git a/drivers/usbhost/Make.defs b/drivers/usbhost/Make.defs
index 2e723ce7b6c..6295ae2f969 100644
--- a/drivers/usbhost/Make.defs
+++ b/drivers/usbhost/Make.defs
@@ -84,7 +84,7 @@ CSRCS += usbhost_trace.c
 endif
 endif
 
-# Include add-on USB host driver logic if present and selected (availabel in
+# Include add-on USB host driver logic if present and selected (available in
 # the NuttX drivers GIT repository)
 
 ifeq ($(CONFIG_USBHOST_RTL8187),y)
diff --git a/drivers/wireless/gs2200m.c b/drivers/wireless/gs2200m.c
index 3015d0e14e4..a6f8e816b23 100644
--- a/drivers/wireless/gs2200m.c
+++ b/drivers/wireless/gs2200m.c
@@ -2905,7 +2905,7 @@ static int gs2200m_initialize(FAR struct gs2200m_dev_s *dev,
       dq_init(&dev->pkt_q[i]);
     }
 
-  /* Intialize SPI driver. */
+  /* Initialize SPI driver. */
 
   ret = gs2200m_spi_init(dev);
 
diff --git a/mm/umm_heap/umm_initialize.c b/mm/umm_heap/umm_initialize.c
index 3fcbd3f85fe..bae28293303 100644
--- a/mm/umm_heap/umm_initialize.c
+++ b/mm/umm_heap/umm_initialize.c
@@ -57,9 +57,9 @@
  *   function will initialize the user heap.
  *
  *   CONFIG_BUILD_FLAT:
- *     There is only kernel mode "blob" containing both containing both
- *     kernel and application code.  There is only one heap that use is
- *     used by both the kernel and application logic.
+ *     There is only kernel mode "blob" containing both kernel and
+ *     application code.  There is only one heap that is used by both the
+ *     kernel and application logic.
  *
  *     In this configuration, this function is called early in nx_start()
  *     to initialize the common heap.
@@ -68,7 +68,7 @@
  *     In this configuration, there are two "blobs", one containing
  *     protected kernel logic and one containing unprotected application
  *     logic.  Depending upon the setting of CONFIG_MM_KERNEL_HEAP there
- *     may be only a signal shared heap, much as with CONFIG_BUILD_FLAT.
+ *     may be only a single shared heap, much as with CONFIG_BUILD_FLAT.
  *     Or there may be separate protected/kernel and unprotected/user
  *     heaps.
  *
diff --git a/net/Kconfig b/net/Kconfig
index a9a417f0779..077e120b272 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -218,7 +218,7 @@ config NETDEV_LATEINIT
 	---help---
 		Normally, networking initialization occur in the later phase of the
 		boot process in the function up_initialize() when it calls the
-		driver initialization function, up_netintialize().  This
+		driver initialization function, up_netinitialize().  This
 		initialization occurs after a sufficient about of the OS has been
 		initialized so that driver registration can be performed, but
 		before the completion of OS initialization and before the first
diff --git a/sched/init/nx_start.c b/sched/init/nx_start.c
index 3798e0178a0..5a3edd2aef6 100644
--- a/sched/init/nx_start.c
+++ b/sched/init/nx_start.c
@@ -543,7 +543,7 @@ void nx_start(void)
       g_idleargv[cpu][1]  = NULL;
       g_idletcb[cpu].argv = &g_idleargv[cpu][0];
 
-      /* Then add the idle task's TCB to the head of the corrent ready to
+      /* Then add the idle task's TCB to the head of the current ready to
        * run list.
        */
 
@@ -855,7 +855,7 @@ void nx_start(void)
        * possible because if the IDLE thread is running, no other task is!
        *
        * WARNING: This logic could have undesirable side-effects if priority
-       * inheritance is enabled.  Imaginee the possible issues if the
+       * inheritance is enabled.  Imagine the possible issues if the
        * priority of the IDLE thread were to get boosted!  Moral: If you
        * use priority inheritance, then you should also enable the work
        * queue so that is done in a safer context.