diff --git a/addons/threadsafety.py b/addons/threadsafety.py
index 07cd5b1ec..889ecd528 100755
--- a/addons/threadsafety.py
+++ b/addons/threadsafety.py
@@ -22,7 +22,7 @@ def checkstatic(data):
             else:
                 type = 'variable'
             if var.isConst:
-                reportError(var.typeStartToken, 'warning', 'Local constant static ' + type + ' \'' + var.nameToken.str + '\', dangerous if it is initialized in parallell threads', 'threadsafety')
+                reportError(var.typeStartToken, 'warning', 'Local constant static ' + type + ' \'' + var.nameToken.str + '\', dangerous if it is initialized in parallel threads', 'threadsafety')
             else:
                 reportError(var.typeStartToken, 'warning', 'Local static ' + type + ': ' + var.nameToken.str, 'threadsafety')
 
diff --git a/lib/checkunusedfunctions.cpp b/lib/checkunusedfunctions.cpp
index d467a82f8..c9598b587 100644
--- a/lib/checkunusedfunctions.cpp
+++ b/lib/checkunusedfunctions.cpp
@@ -248,7 +248,7 @@ static bool isOperatorFunction(const std::string & funcName)
      * Conversion functions must be a member function (at least for gcc), so no
      * need to cover them for unused functions.
      *
-     * To speed up the comparision, not the whole list of operators is used.
+     * To speed up the comparison, not the whole list of operators is used.
      * Instead only the character after the operator prefix is checked to be a
      * none alpa numeric value, but the '_', to cover function names like
      * "operator_unused". In addition the following valid operators are checked:
diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index 863aae7cf..840c87139 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -4042,7 +4042,7 @@ const Function* Scope::findFunction(const Token *tok, bool requireConst) const
                 checkVariableCallMatch(callarg, funcarg, same, fallback1, fallback2);
             }
 
-            // check for a match with refrence of a variable
+            // check for a match with reference of a variable
             else if (Token::Match(arguments[j], "* %var% ,|)")) {
                 const Variable * callarg = check->getVariableFromVarId(arguments[j]->next()->varId());
                 if (callarg) {
diff --git a/man/cppcheck.1.xml b/man/cppcheck.1.xml
index 3c71bb7c1..59cb03eaf 100644
--- a/man/cppcheck.1.xml
+++ b/man/cppcheck.1.xml
@@ -555,7 +555,7 @@ There are false positives with this option. Each result must be carefully invest
   </refsect1>
   <refsect1 id="see_also">
     <title>SEE ALSO</title>
-    <!-- In alpabetical order. -->
+    <!-- In alphabetical order. -->
     <para>Full list of features: http://cppcheck.wiki.sourceforge.net/</para>
   </refsect1>
 </refentry>