Actually, semantical doesn't appear to be a word.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27983 91177308-0d34-0410-b5e6-96231b3b80d8

docs/FAQ.html

@@ -418,7 +418,7 @@
   <p>Currently, there isn't much. LLVM supports an intermediate representation
   which is useful for code representation but will not support the high level
   (abstract syntax tree) representation needed by most compilers. There are no
-  facilities for lexical nor semantical analysis. There is, however, a <i>mostly
+  facilities for lexical nor semantic analysis. There is, however, a <i>mostly
     implemented</i> configuration-driven 
   <a href="CompilerDriver.html">compiler driver</a> which simplifies the task
   of running optimizations, linking, and executable generation.</p>