Specialized Links
- Railroad Definitions The most complete online railroad glossary: more than 400 entries. Contains American, British, South-African railroad-related terms and slang.
- NASA Thesaurus National Aeronautics and Space Administration Thesaurus. Extensive coverage of scientific terms.
- CAS General Subject Vocabulary Helper Extensive listings for chemistry. Produced by Chemical Abstracts Service, a division of the American Chemical Society.
- The Astronomy Thesaurus Astronomical terms. Searches may be performed in English, French, German, Italian, and Spanish.
- Eurodic Autom European Union terminology. Available on most European Union languages.
- 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.
- Mathematical Thesaurus Defines mathematical words and concepts, and indicates the links between them.
- Babynames Thesaurus You can search for a name from its meanings. The site has more than 10,000 names with meanings.
- 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.
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