Not sure if it's exactly what you're looking for, but you might want to check out WordNet, a lexical database. You can first try it online to see if it fits you

Not sure if it's exactly what you're looking for, but you might want to check out WordNet, a lexical database. You can first try it online to see if it fits your needs: http://wordnetweb.princeton.edu/perl/webwn http://wordnetweb.princeton.edu/perl/webwn