Searchable online database about folklore, ethnomusicology, ethnology, and related fields.

Alcohol and drugs thesaurus. Contains over 130,000 records and covers the period from 1972 to 2003.

The Getty Museum provides this art and architecture thesaurus.

Astronomy thesaurus compiled by Robyn and Robert Shobbrook available in English, French, German, Italian, and Spanish.

An extensive database of babies names with a full explanation of their meanings.

Searchable database of pure and applied life sciences, technology, and social sciences.

Cooking encyclopedia covering thousands of ingredients and kitchen tools.

Online synonym reference with more than 30,320 main entries. Homepage features a "word of the day".

Provides a visual presentation of synonyms for a particular word. Offers an option to save the image presented.

Online "connected thesaurus" tool allows users to find related words, words that rhyme, words that contain substrings, and more.

Searchable database of synonymous words from one of the world's leading lexical reference companies.

Searchable synonyms resource with links to other online vocabulary tools and references.

Online thesaurus allowing users to search for similar phrases.

Yahoo! reference arranged by categories and alphabetically.

Offers synonyms, antonyms, and definitions, as well as a word of the day.

Online thesaurus reference resource that also provides images for search terms.

Free online Roget's Thesaurus of the English Language.

Provides shorter equivalent terms or synonyms for long words. Makes use of the Princeton University WordNet Database.

Thesaurus developed and used by United Nations Educational, Scientific and Cultural Organization for vocabulary control.

Thesaurus that displays word relationships visually.

English lexical database developed by the Princeton University Cognitive Science Laboratory.

Provides a search engine thesaurus for finding similar words and phrases.

Provides a visual representation of the relationship between words through word clouds and images. Also offers definitions.

Lexical tool and reference that also features a glossary maker, quiz builder, and a crossword puzzle helper.