While many applications feature a dictionary, this latest application will come in handy for those who have been searching for a quality thesaurus to add to their bevy of computer tools. Nisus Thesaurus can be used in any services enabled application and it contains over 120,000 words and a built-in glossary. Even better is the fact that when users look for any given word, the Nisus Thesaurus will show related words in six different categories. This application is compatible with all systems running Mac OS X.