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. http://www.bartleby.com/reference/ More Info
Phrases Thesaurus A resource for writers. Enter a single word and it will return a list of phrases and sayings that are related to the word in some way. In English. http://www.phrasefinder.co.uk/ More Info
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 http://www.visualthesaurus.com/ More Info
