Nisus Software today announced the public beta release of its latest product, Nisus Thesaurus. Nisus Thesaurus offers a fast electronic thesaurus that automatically integrates with any Service aware application including Nisus Writer Express, Mail, TextEdit, Safari, and more. Nisus Thesaurus is based on the WordNet lexical database. Features include a 120,000 word database, a Cocoa based interface, integration with any services enabled application, built-in glossary, offensive words filter and more. Nisus Thesaurus requires Mac OS X 10.2 or later and the final product is expected to ship later this year.