When a person misspell a word in which part of linguistics he needs to work on
syntax, morphology, phonology, or semantics?
http://www.google.com/search?hl=en&ie=UTF-8&defl=en&q=define:syntax&sa=X&oi=glossary_definition&ct=title
http://en.wikipedia.org/wiki/Morphology_(linguistics)
http://www.edgateway.net/pub/docs/pel/glossary.htm
Scroll down to phonology.
Aslo scroll down to semantics.