Provides direct term search followed by hierarchical and other types of browsing. Based on a UNESCO thesaurus.
http://www.data-archive.ac.uk/search/hassetSearch.asp - New window - Cached - Archive -
Contains the vocabulary of English from the earliest written records to the present, with known recorded dates of usage, taken from the Oxford English Dictionary.
http://www2.arts.gla.ac.uk/SESLL/EngLang/thesaur/homepage.htm - New window - Cached - Archive -
Allows direct term search with results hyperlinked to broader and narrower search terms. Available in English and Estonian.
http://ingrid.utlib.ee/thesaurus.html - New window - Cached - Archive -
Search for relationships between words and concepts that might never have occurred to you before.
http://www.lexfn.com/ - New window - Cached - Archive -
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 - New window - Cached - Archive -
3rd edition. Contains over 260,000 synonyms and cross-references. Features succinct word definitions and hyperlinked category index.
http://education.yahoo.com/reference/thesaurus/ - New window - Cached - Archive -
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/thesauri/ - New window - Cached - Archive -
E-text of Roget's Thesaurus No. Two, which is derived from the version of Roget's Thesaurus published in 1911.
http://asadz.com/thesaurus/ - New window - Cached - Archive -