diff --git a/lib/checkclass.cpp b/lib/checkclass.cpp
index 04d20987c..c1809395b 100644
--- a/lib/checkclass.cpp
+++ b/lib/checkclass.cpp
@@ -516,7 +516,7 @@ void CheckClass::initializationListUsage()
 
         Scope* owner = scope->functionOf;
         for (const Token* tok = scope->classStart; tok != scope->classEnd; tok = tok->next()) {
-            if (Token::Match(tok, "%var% (")) // Assignments might depend on this function call or if/for/while/switch statment from now on.
+            if (Token::Match(tok, "%var% (")) // Assignments might depend on this function call or if/for/while/switch statement from now on.
                 break;
             if (Token::Match(tok, "try|do {"))
                 break;
diff --git a/lib/checkinternal.cpp b/lib/checkinternal.cpp
index 1fe1977b9..80e92ad1f 100644
--- a/lib/checkinternal.cpp
+++ b/lib/checkinternal.cpp
@@ -237,8 +237,8 @@ void CheckInternal::missingPercentCharacterError(const Token* tok, const std::st
 
 void CheckInternal::unknownPatternError(const Token* tok, const std::string& pattern)
 {
-    reportError(tok, Severity::error, "unkownPattern",
-                "Unkown pattern used: \"" + pattern + "\"");
+    reportError(tok, Severity::error, "unknownPattern",
+                "Unknown pattern used: \"" + pattern + "\"");
 }
 
 #endif // #ifndef NDEBUG
diff --git a/lib/checkinternal.h b/lib/checkinternal.h
index fb4071131..750b5fcab 100644
--- a/lib/checkinternal.h
+++ b/lib/checkinternal.h
@@ -65,7 +65,7 @@ public:
     /** @brief %Check for missing % end character in Token::Match pattern */
     void checkMissingPercentCharacter();
 
-    /** @brief %Check for for unkown (invalid) complex patterns like "%typ%" */
+    /** @brief %Check for for unknown (invalid) complex patterns like "%typ%" */
     void checkUnknownPattern();
 
 private:
diff --git a/lib/checkio.cpp b/lib/checkio.cpp
index 821e1c086..00d6183ce 100644
--- a/lib/checkio.cpp
+++ b/lib/checkio.cpp
@@ -63,7 +63,7 @@ void CheckIO::coutCerrMisusageError(const Token* tok, const std::string& streamN
 
 //---------------------------------------------------------------------------
 // fflush(stdin) <- fflush only applies to output streams in ANSI C
-// fread(); fwrite(); <- consecutive read/write statements require repositioning inbetween
+// fread(); fwrite(); <- consecutive read/write statements require repositioning in between
 // fopen("","r"); fwrite(); <- write to read-only file (or vice versa)
 // fclose(); fread(); <- Use closed file
 //---------------------------------------------------------------------------
@@ -258,7 +258,7 @@ void CheckIO::fflushOnInputStreamError(const Token *tok, const std::string &varn
 void CheckIO::ioWithoutPositioningError(const Token *tok)
 {
     reportError(tok, Severity::error,
-                "IOWithoutPositioning", "Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush inbetween result in undefined behaviour.");
+                "IOWithoutPositioning", "Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush in between result in undefined behaviour.");
 }
 
 void CheckIO::readWriteOnlyFileError(const Token *tok)
diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 9898293a9..6ed79dda8 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -4059,9 +4059,9 @@ void Tokenizer::simplifyCompoundAssignment()
                 while (tok->next()->str() != ";")
                     tok->deleteNext();
             } else {
-                // Enclose the rhs in parantheses..
+                // Enclose the rhs in parenthesis..
                 if (!Token::Match(tok->tokAt(2), "[;)]")) {
-                    // Only enclose rhs in parantheses if there is some operator
+                    // Only enclose rhs in parenthesis if there is some operator
                     bool someOperator = false;
                     for (Token *tok2 = tok->next(); tok2; tok2 = tok2->next()) {
                         if (tok2->str() == "(")
diff --git a/test/testinternal.cpp b/test/testinternal.cpp
index 56dfaaca5..160cd0b65 100644
--- a/test/testinternal.cpp
+++ b/test/testinternal.cpp
@@ -214,7 +214,7 @@ private:
               "    Token::Match(tok, \"foo % %type % bar\");\n"
               "}");
         ASSERT_EQUALS("[test.cpp:3]: (error) Missing percent end character in Token::Match() pattern: \"foo % %type % bar\"\n"
-                      "[test.cpp:3]: (error) Unkown pattern used: \"%type %\"\n", errout.str());
+                      "[test.cpp:3]: (error) Unknown pattern used: \"%type %\"\n", errout.str());
 
         // Find missing % also in 'alternatives' pattern
         check("void f() {\n"
@@ -235,7 +235,7 @@ private:
         check("void f() {\n"
               "    Token::Match(tok, \"%typ%\");\n"
               "}");
-        ASSERT_EQUALS("[test.cpp:2]: (error) Unkown pattern used: \"%typ%\"\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:2]: (error) Unknown pattern used: \"%typ%\"\n", errout.str());
 
         // Make sure we don't take %or% for a broken %oror%
         check("void f() {\n"
diff --git a/test/testio.cpp b/test/testio.cpp
index b54647202..ff9f10016 100644
--- a/test/testio.cpp
+++ b/test/testio.cpp
@@ -286,13 +286,13 @@ private:
               "    fwrite(buffer, 5, 6, f);\n"
               "    fread(buffer, 5, 6, f);\n"
               "}");
-        ASSERT_EQUALS("[test.cpp:3]: (error) Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush inbetween result in undefined behaviour.\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (error) Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush in between result in undefined behaviour.\n", errout.str());
 
         check("void foo(FILE* f) {\n"
               "    fread(buffer, 5, 6, f);\n"
               "    fwrite(buffer, 5, 6, f);\n"
               "}");
-        ASSERT_EQUALS("[test.cpp:3]: (error) Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush inbetween result in undefined behaviour.\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (error) Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush in between result in undefined behaviour.\n", errout.str());
 
         check("void foo(FILE* f, bool read) {\n"
               "    if(read)\n"
@@ -335,7 +335,7 @@ private:
               "    long pos = ftell(f);\n"
               "    fwrite(buffer, 5, 6, f);\n"
               "}");
-        ASSERT_EQUALS("[test.cpp:4]: (error) Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush inbetween result in undefined behaviour.\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:4]: (error) Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush in between result in undefined behaviour.\n", errout.str());
     }
 
     void fflushOnInputStream() {