Agrothesaurus
Latin-Slovenian-English glossary of plants and animals.
Domain: agroweb.bf.uni-lj.si

Alcohol and Other Drug Thesaurus
National Institutes of Health thesaurus. Provides resource for medical, social, and demographic terms related to alcohol and drug use.
Domain: etoh.niaaa.nih.gov

Art and Architecture Thesaurus
A structured vocabulary for describing and indexing the visual arts and architecture.
Domain: getty.edu

AskOxford.com
Contains a dictionary and thesaurus, as well as quotations, word of the day, games, and lexicography.
Domain: askoxford.com

Babynames Thesaurus
You can search for a name from its meanings. The site has more than 10,000 names with meanings.
Domain: yourbabysname.com

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.
Domain: bartleby.com

Bartleby.com - Roget's II - The New Thesaurus
Contains 35,000 synonyms, succinct word definitions and a hyperlinked category index.
Domain: bartleby.com

beetfoundation.com Dictionary and Thesaurus
General purpose online English language dictionary and Thesaurus.
Domain: beetfoundation.com

Concept Space: the visual search tool for business concepts
A British business education thesaurus with an intriguing navigational component from the London Business School.
Domain: conceptspace.london.edu

Dictionary.com
Free online English dictionary, thesaurus and reference guide, crossword puzzles and other word games, online translator and Word of the Day.
Domain: dictionary.com

FinnPlace Dictionary
English-Finnish-English electronic dictionary with an extensive vocabulary and an English thesaurus. By Jarno Tarkoma.
Domain: tracetech.net

Germ
Searchable WordNet and Roget's Thesaurus with meaning trees.
Domain: germ.cz

Getty Thesaurus of Geographic Names
Structured vocabulary of place names.
Domain: getty.edu

Historical Thesaurus of English
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.
Domain: www2.arts.gla.ac.uk

HyperDic
Based on the WordNet lexical database and thesaurus, covers a selection of the most frequent English words. Includes synonyms, antonyms, examples and pronunciation and more.
Domain: hyperdic.net

INGRID Library Thesaurus
Allows direct term search with results hyperlinked to broader and narrower search terms. Available in English and Estonian.
Domain: ingrid.utlib.ee

Library of Congress Classification Schedules
A comprehensive list of LOC Classification schedules.
Domain: loc.gov

Library of Congress Thesauri
Links to multiple LOC thesauri, including GLIN, the Global Legal Information Network.
Domain: loc.gov

LookWAYup English - Spanish Dictionary
Bidirectional English to Spanish dictionary, with definitions and thesaurus. Corrects spelling including accents.
Domain: lookwayup.com

Mathematical Thesaurus
Definitions of common mathematical terms, along with broader, narrower, and related concepts.
Domain: thesaurus.maths.org

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