Bartleby.com: Reference
Includes "Roget's International Thesaurus of English Words and Phrases" and Houghton-Mifflin's "Roget's II: The New Thesaurus," third edition.
Plumb Design Visual Thesaurus
An exploration of sense relationships within the English language. By clicking on words, you follow a thread of meaning, creating a spatial map of linguistic associations.
Roget's International Thesaurus of English Words and Phrases
Online publication of this popular thesaurus made available by Bartleby.com.
Sybrina's Phrase Thesaurus
A creative phrase tool for creative writers of any genre including college students, people just learning English, people wanting to improve their communication skills, artistic pr…
Wordsmyth Educational Dictionary-Thesaurus
Integrated english dictionary and thesaurus.
Yahoo! Roget's II Thesaurus
Contains over 260,000 synonyms and cross-references. Features succinct word definitions and hyperlinked category index.