Search The Directory The Web for Home > Reference > Thesauri > Specialized New! Submit a site   whatUseek Collection Sites (submit a site ):   Give your site great placement in this category in as little as two business days!     whatUseek Directory Site Listings:   A Writer's Guide to Sassy Synonyms - Promotion for a reference guide to assist in finding the right word to use in place of "said", "replied", "asked" etc.   Babynames Thesaurus - This is a thesaurus of names and meanings. You can search a name knowing its meaning. Contains more than 10,000 names and meanings.   CAS General Subject Vocabulary Helper - Extensive listings for chemistry. Produced by Chemical Abstracts Service, a division of the American Chemical Society.   Eurodic Autom - European Union terminology. Available on most European Union languages.   Mathematical Thesaurus - Defines mathematical words and concepts, and indicates the links between them.   NASA Thesaurus - National Aeronautics and Space Administration Thesaurus. Extensive coverage of scientific terms.   OECD Macrothesaurus - Organization for Economic Co-operation and Development. Available in English, German, French, and Spanish. Thesaurus of sociological and economic issues pertaining to international development.   Railroad Definitions - The most complete online railroad glossary: more than 400 entries. Contains American, British, South-African railroad-related terms and slang.   The Astronomy Thesaurus - Astronomical terms. Searches may be performed in English, French, German, Italian, and Spanish. Help build the largest human-edited directory on the web.   Submit a Site - Open Directory Project - Become an Editor

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