Thesaurus

Thesaurus.com
Free online English thesaurus.

Roget's International Thesaurus of English Words and Phrases
Peter Roget's classic structure coupled with Mawson's modernization becomes even more user-friendly on Bartleby.com with 85,000 hyperlinked cross-references

Thesaurus - Answers.com
Thesaurus from Answers.com - the ultimate answer engine, with quick accurate dictionary.

Visual Thesaurus
What is it? The Visual Thesaurus is an interactive dictionary and thesaurus with an innovative display that encourages exploration and learning.

Roget's Thesaurus
Bibliomania: Free Online Literature and Study Guides

Roget's Thesaurus
Roget's Thesaurus Alphabetical Index

UNESCO Thesaurus
This web site allows you to browse the UNESCO Thesaurus. It also provides information about the UNESCO Thesaurus.