diff --git a/lib/checkother.cpp b/lib/checkother.cpp
index 143e6010f..12c1e6188 100644
--- a/lib/checkother.cpp
+++ b/lib/checkother.cpp
@@ -2549,7 +2549,7 @@ void CheckOther::checkExpressionRange(const std::list<const Function*> &constFun
     for (; it != expressions.getMap().end(); ++it) {
         // check expression..
         bool valid = true;
-        unsigned int parantheses = 0;  // ()
+        unsigned int parenthesis = 0;  // ()
         unsigned int brackets = 0;     // []
 
         // taking address?
@@ -2559,13 +2559,13 @@ void CheckOther::checkExpressionRange(const std::list<const Function*> &constFun
 
         for (const Token *tok = it->second.start; tok && tok != it->second.end; tok = tok->next()) {
             if (tok->str() == "(") {
-                ++parantheses;
+                ++parenthesis;
             } else if (tok->str() == ")") {
-                if (parantheses == 0) {
+                if (parenthesis == 0) {
                     valid = false;
                     break;
                 }
-                --parantheses;
+                --parenthesis;
             } else if (tok->str() == "[") {
                 ++brackets;
             } else if (tok->str() == "]") {
@@ -2580,7 +2580,7 @@ void CheckOther::checkExpressionRange(const std::list<const Function*> &constFun
             }
         }
 
-        if (!valid || parantheses!=0 || brackets!=0)
+        if (!valid || parenthesis!=0 || brackets!=0)
             continue;
 
         const ExpressionTokens &expr = it->second;
diff --git a/lib/symboldatabase.h b/lib/symboldatabase.h
index e58f5d99a..a26373626 100644
--- a/lib/symboldatabase.h
+++ b/lib/symboldatabase.h
@@ -363,7 +363,7 @@ private:
     /** @brief array dimensions */
     std::vector<Dimension> _dimensions;
 
-    /** @brief fill in information, depending on Tokens given at instanciation */
+    /** @brief fill in information, depending on Tokens given at instantiation */
     void evaluate();
 };
 
diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index ae9fb5b7d..1d1011bcd 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -7388,17 +7388,17 @@ bool Tokenizer::isFunctionParameterPassedByValue(const Token *fpar) const
     const Token *ftok;
 
     // Look at function call, what parameter number is it?
-    unsigned int paranthesis = 1;
+    unsigned int parenthesis = 1;
     unsigned int parameter = 1;
     for (ftok = fpar; ftok; ftok = ftok->previous()) {
         if (ftok->str() == "(") {
-            --paranthesis;
-            if (paranthesis == 0) {
+            --parenthesis;
+            if (parenthesis == 0) {
                 break;
             }
         } else if (ftok->str() == ")") {
-            ++paranthesis;
-        } else if (paranthesis == 1 && ftok->str() == ",") {
+            ++parenthesis;
+        } else if (parenthesis == 1 && ftok->str() == ",") {
             ++parameter;
         } else if (Token::Match(ftok, "[;{}]")) {
             break;
diff --git a/test/testother.cpp b/test/testother.cpp
index c481f84f1..006ff23d4 100644
--- a/test/testother.cpp
+++ b/test/testother.cpp
@@ -142,7 +142,7 @@ private:
         TEST_CASE(duplicateIf);
         TEST_CASE(duplicateIf1); // ticket 3689
         TEST_CASE(duplicateBranch);
-        TEST_CASE(duplicateBranch1); // tests extracted by http://www.viva64.com/en/b/0149/ ( Comparision between PVS-Studio and cppcheck ): Errors detected in Quake 3: Arena by PVS-Studio: Fragement 2
+        TEST_CASE(duplicateBranch1); // tests extracted by http://www.viva64.com/en/b/0149/ ( Comparison between PVS-Studio and cppcheck ): Errors detected in Quake 3: Arena by PVS-Studio: Fragement 2
         TEST_CASE(duplicateExpression1);
         TEST_CASE(duplicateExpression2); // ticket #2730
         TEST_CASE(duplicateExpression3); // ticket #3317
@@ -4070,7 +4070,7 @@ private:
 
     void duplicateBranch1() {
 
-        // tests inspired by http://www.viva64.com/en/b/0149/ ( Comparision between PVS-Studio and cppcheck )
+        // tests inspired by http://www.viva64.com/en/b/0149/ ( Comparison between PVS-Studio and cppcheck )
         // Errors detected in Quake 3: Arena by PVS-Studio: Fragement 2
         check("void f()\n"
               "{\n"