diff --git a/arm-gen.c b/arm-gen.c
index f85c263..f535a09 100644
--- a/arm-gen.c
+++ b/arm-gen.c
@@ -1783,7 +1783,7 @@ static uint32_t is_fconst()
 }
 
 /* generate a floating point operation 'v = t1 op t2' instruction. The
-   two operands are guaranted to have the same floating point type */
+   two operands are guaranteed to have the same floating point type */
 void gen_opf(int op)
 {
   uint32_t x, r, r2, c1, c2;
diff --git a/elf.h b/elf.h
index c3eab71..9fed6eb 100644
--- a/elf.h
+++ b/elf.h
@@ -232,7 +232,7 @@ typedef struct
 
 #define EM_FX66		66		/* Siemens FX66 microcontroller */
 #define EM_ST9PLUS	67		/* STMicroelectronics ST9+ 8/16 mc */
-#define EM_ST7		68		/* STmicroelectronics ST7 8 bit mc */
+#define EM_ST7		68		/* STMicroelectronics ST7 8 bit mc */
 #define EM_68HC16	69		/* Motorola MC68HC16 microcontroller */
 #define EM_68HC11	70		/* Motorola MC68HC11 microcontroller */
 #define EM_68HC08	71		/* Motorola MC68HC08 microcontroller */
@@ -817,7 +817,7 @@ typedef struct
 #define	DF_1_EDITED	0x00200000	/* Object is modified after built.  */
 #define	DF_1_NORELOC	0x00400000
 #define	DF_1_SYMINTPOSE	0x00800000	/* Object has individual interposers.  */
-#define	DF_1_GLOBAUDIT	0x01000000	/* Global auditin required.  */
+#define	DF_1_GLOBAUDIT	0x01000000	/* Global auditing required.  */
 #define	DF_1_SINGLETON	0x02000000	/* Singleton symbols are used.  */
 
 /* Flags for the feature selection in DT_FEATURE_1.  */
@@ -1313,7 +1313,7 @@ typedef struct
 #define R_SPARC_LM22		36	/* Low middle 22 bits of ... */
 #define R_SPARC_PC_HH22		37	/* Top 22 bits of pc rel 64 bit */
 #define R_SPARC_PC_HM10		38	/* High middle 10 bit of ... */
-#define R_SPARC_PC_LM22		39	/* Low miggle 22 bits of ... */
+#define R_SPARC_PC_LM22		39	/* Low middle 22 bits of ... */
 #define R_SPARC_WDISP16		40	/* PC relative 16 bit shifted */
 #define R_SPARC_WDISP19		41	/* PC relative 19 bit shifted */
 #define R_SPARC_GLOB_JMP	42	/* was part of v9 ABI but was removed */
diff --git a/i386-gen.c b/i386-gen.c
index 4924381..b9c3599 100644
--- a/i386-gen.c
+++ b/i386-gen.c
@@ -175,7 +175,7 @@ ST_FUNC void gen_addrpc32(int r, Sym *sym, int c)
     gen_le32(c - 4);
 }
 
-/* generate a modrm reference. 'op_reg' contains the addtional 3
+/* generate a modrm reference. 'op_reg' contains the additional 3
    opcode bits */
 static void gen_modrm(int op_reg, int r, Sym *sym, int c)
 {
diff --git a/lib/bcheck.c b/lib/bcheck.c
index d0c1ae2..90f0ad2 100644
--- a/lib/bcheck.c
+++ b/lib/bcheck.c
@@ -244,7 +244,7 @@ BOUND_PTR_INDIR(16)
 
 #if defined(__GNUC__) && (__GNUC__ >= 6)
 /*
- * At least gcc 6.2 complains when __builtin_frame_address is used whith
+ * At least gcc 6.2 complains when __builtin_frame_address is used with
  * nonzero argument.
  */
 #pragma GCC diagnostic push
diff --git a/tcc.h b/tcc.h
index 06965eb..0a1de29 100644
--- a/tcc.h
+++ b/tcc.h
@@ -1453,7 +1453,7 @@ ST_FUNC int handle_eob(void);
 
 /* ------------ xxx-link.c ------------ */
 
-/* Wether to generate a GOT/PLT entry and when. NO_GOTPLT_ENTRY is first so
+/* Whether to generate a GOT/PLT entry and when. NO_GOTPLT_ENTRY is first so
    that unknown relocation don't create a GOT or PLT entry */
 enum gotplt_entry {
     NO_GOTPLT_ENTRY,	/* never generate (eg. GLOB_DAT & JMP_SLOT relocs) */
diff --git a/tccgen.c b/tccgen.c
index e6a56a7..02e40de 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -3637,7 +3637,7 @@ static void struct_layout(CType *type, AttributeDef *ad)
         if (bit_pos + bit_size <= size * 8 && f->c + size <= c)
             continue;
 
-        /* try to access the field using a differnt type */
+        /* try to access the field using a different type */
         c0 = -1, s = align = 1;
         for (;;) {
             px = f->c * 8 + bit_pos;
diff --git a/tccpp.c b/tccpp.c
index 7561b36..39386f4 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -2108,7 +2108,7 @@ static void parse_escape_string(CString *outstr, const uint8_t *buf, int is_long
             /* reference: The Unicode Standard, Version 10.0, ch3.9 */
 
             int cont; /* count of continuation bytes */
-            int skip; /* how many bytes should skip when error occured */
+            int skip; /* how many bytes should skip when error occurred */
             int i;
 
             /* decode leading byte */
@@ -3517,7 +3517,7 @@ no_subst:
             if (t == TOK_NOSUBST)
                 nosubst = 1;
         }
-        /* GCC supports 'defined' as result of a macto substitution */
+        /* GCC supports 'defined' as result of a macro substitution */
         if (t == TOK_DEFINED && pp_expr)
             nosubst = 2;
     }
diff --git a/tests/abitest.c b/tests/abitest.c
index c4059d4..4a192bd 100644
--- a/tests/abitest.c
+++ b/tests/abitest.c
@@ -425,7 +425,7 @@ static int two_member_union_test(void) {
 }
 
 /*
- * Win64 calling convetntion test.
+ * Win64 calling convention test.
  */
 
 typedef struct many_struct_test_type_s {long long a, b, c;} many_struct_test_type;
diff --git a/tests/pp/15.c b/tests/pp/15.c
index d989bee..3bbc3ca 100644
--- a/tests/pp/15.c
+++ b/tests/pp/15.c
@@ -14,5 +14,5 @@ return n(0x1E)n(-1);
 // unlike gcc but correct
 XXX: return n(x)+n(x)-n(1)+n(1)-2;
 
-// unlile gcc, but cannot appear in valid C
+// unlike gcc, but cannot appear in valid C
 XXX: return n(x)n(x)n(1)n(2)n(x);
diff --git a/tests/tcctest.c b/tests/tcctest.c
index 2add498..7877243 100644
--- a/tests/tcctest.c
+++ b/tests/tcctest.c
@@ -384,7 +384,7 @@ void macro_test(void)
     MF_s("hi");
     MF_t("hi");
     
-    /* test macro substituion inside args (should not eat stream) */
+    /* test macro substitution inside args (should not eat stream) */
     printf("qq=%d\n", qq(qq)(2));
 
     /* test zero argument case. NOTE: gcc 2.95.x does not accept a
@@ -404,7 +404,7 @@ comment
        substituted */
     TEST2();
 
-    /* And again when the name and parenthes are separated by a
+    /* And again when the name and parentheses are separated by a
        comment.  */
     TEST2 /* the comment */ ();
 
@@ -3117,7 +3117,7 @@ static __inline__ unsigned long long inc64(unsigned long long a)
     unsigned long long res;
 #ifdef __x86_64__
     /* Using the A constraint is wrong, and increments are tested
-       elsewere.  */
+       elsewhere.  */
     res = a + 1;
 #else
     __asm__("addl $1, %%eax ; adcl $0, %%edx" : "=A" (res) : "A" (a));
diff --git a/tests/tests2/87_dead_code.c b/tests/tests2/87_dead_code.c
index 92983f5..98d4566 100644
--- a/tests/tests2/87_dead_code.c
+++ b/tests/tests2/87_dead_code.c
@@ -9,7 +9,7 @@ static void kb_wait_1(void)
       /* Here the else arm is a statement expression that's supposed
          to be suppressed.  The label inside the while would unsuppress
 	 code generation again if not handled correctly.  And that
-	 would wreak havok to the cond-expression because there's no
+	 would wreak havoc to the cond-expression because there's no
 	 jump-around emitted, the whole statement expression really
 	 needs to not generate code (perhaps except useless forward jumps).  */
       (1 ? 
diff --git a/tests/tests2/90_struct-init.c b/tests/tests2/90_struct-init.c
index ab33812..d931e23 100644
--- a/tests/tests2/90_struct-init.c
+++ b/tests/tests2/90_struct-init.c
@@ -60,7 +60,7 @@ struct U gu4 = { 3, {5,6,7,},  5, { "bla", {44}} };
 struct S gs3 = { (1), {(2)}, {(((3))), {4}}};
 /* Superfluous braces, and leaving out braces for V.t, plus cast */
 struct V gv = {{{3},4,{5,6}}, "haha", (u8)45, 46};
-/* Compund literal */
+/* Compound literal */
 struct V gv2 = {(struct S){7,8,{9,10}}, {"hihi", 47}, 48};
 /* Parens around compound literal */
 struct V gv3 = {((struct S){7,8,{9,10}}), {"hoho", 49}, 50};
@@ -157,7 +157,7 @@ void foo (struct W *w, struct pkthdr *phdr_)
   struct S ls3 = { (1), (2), {(((3))), 4}};
   /* Superfluous braces, and leaving out braces for V.t, plus cast */
   struct V lv = {{3,4,{5,6}}, "haha", (u8)45, 46};
-  /* Compund literal */
+  /* Compound literal */
   struct V lv2 = {(struct S)w->t.s, {"hihi", 47}, 48};
   /* Parens around compound literal */
   struct V lv3 = {((struct S){7,8,{9,10}}), ((const struct W *)w)->t.t, 50};
diff --git a/tests/tests2/99_fastcall.c b/tests/tests2/99_fastcall.c
index 1ac8a5f..ee4b67d 100644
--- a/tests/tests2/99_fastcall.c
+++ b/tests/tests2/99_fastcall.c
@@ -89,10 +89,10 @@ struct trapframe {
 /////////////////////////////////////////////////////////////////////////
 //////////                SAFECALL FRAMEWORK
 /////////////////////////////////////////////////////////////////////////
-// this framwork will convert any calling convention to cdecl
+// this framework will convert any calling convention to cdecl
 // usage: first set call target with 'SET_SAFECALL_TARGET(x)'
-//        then cast 'SAFECALL' to target funtion pointer type and invoke it
-//        after calling, 'ESPDIFF' is the differance of old and new esp
+//        then cast 'SAFECALL' to target function pointer type and invoke it
+//        after calling, 'ESPDIFF' is the difference of old and new esp
 
 void *SYMBOL(sc_call_target);
 unsigned SYMBOL(sc_retn_addr);
diff --git a/tests/tests2/Makefile b/tests/tests2/Makefile
index 3ff60fd..6bff618 100644
--- a/tests/tests2/Makefile
+++ b/tests/tests2/Makefile
@@ -27,7 +27,7 @@ ifeq (-$(findstring gcc,$(CC))-,--)
  SKIP += $(patsubst %.expect,%.test,$(GEN-ALWAYS))
 endif
 ifeq (-$(CONFIG_WIN32)-$(CONFIG_i386)$(CONFIG_arm)-,--yes-)
- SKIP += 95_bitfields%.test # type_align is differnt on 32bit-non-windows
+ SKIP += 95_bitfields%.test # type_align is different on 32bit-non-windows
 endif
 
 # Some tests might need arguments
diff --git a/win32/include/conio.h b/win32/include/conio.h
index 6c1dc97..39f779e 100644
--- a/win32/include/conio.h
+++ b/win32/include/conio.h
@@ -194,7 +194,7 @@ extern "C" {
   }
  
   /* Register sizes are different between 32/64 bit mode. So we have to do this for _WIN64 and _WIN32
-     seperatly.  */
+     separately.  */
  
 #ifdef _WIN64
   __CRT_INLINE void __writecr0(unsigned __int64 Data)
diff --git a/win32/include/math.h b/win32/include/math.h
index 297184f..74add20 100644
--- a/win32/include/math.h
+++ b/win32/include/math.h
@@ -327,7 +327,7 @@ extern "C" {
 #define isinf(x) (fpclassify(x) == FP_INFINITE)
 
   /* 7.12.3.4 */
-  /* We don't need to worry about trucation here:
+  /* We don't need to worry about truncation here:
   A NaN stays a NaN. */
 #define isnan(x) (fpclassify(x) == FP_NAN)
 
diff --git a/win32/include/stdint.h b/win32/include/stdint.h
index cdebf44..cde32b6 100644
--- a/win32/include/stdint.h
+++ b/win32/include/stdint.h
@@ -178,7 +178,7 @@ typedef unsigned long long   uintmax_t;
 
 /* 7.18.4.1  Macros for minimum-width integer constants
 
-    Accoding to Douglas Gwyn <gwyn@arl.mil>:
+    According to Douglas Gwyn <gwyn@arl.mil>:
 	"This spec was changed in ISO/IEC 9899:1999 TC1; in ISO/IEC
 	9899:1999 as initially published, the expansion was required
 	to be an integer constant of precisely matching type, which
diff --git a/win32/include/values.h b/win32/include/values.h
index 10e16a2..1cd643c 100644
--- a/win32/include/values.h
+++ b/win32/include/values.h
@@ -1,4 +1,4 @@
 /*
  * TODO: Nothing here yet. Should provide UNIX compatibility constants
- * comparible to those in limits.h and float.h.
+ * comparable to those in limits.h and float.h.
  */
diff --git a/x86_64-gen.c b/x86_64-gen.c
index 72842d6..f4d86e1 100644
--- a/x86_64-gen.c
+++ b/x86_64-gen.c
@@ -314,14 +314,14 @@ static void gen_modrm_impl(int op_reg, int r, Sym *sym, int c, int is_got)
     }
 }
 
-/* generate a modrm reference. 'op_reg' contains the addtional 3
+/* generate a modrm reference. 'op_reg' contains the additional 3
    opcode bits */
 static void gen_modrm(int op_reg, int r, Sym *sym, int c)
 {
     gen_modrm_impl(op_reg, r, sym, c, 0);
 }
 
-/* generate a modrm reference. 'op_reg' contains the addtional 3
+/* generate a modrm reference. 'op_reg' contains the additional 3
    opcode bits */
 static void gen_modrm64(int opcode, int op_reg, int r, Sym *sym, int c)
 {