Thesauri
- Art and Architecture
- Thesaurus maintained by the Getty Center
- ERIC Thesaurus
- Education Resources Information Center
- Lexical FreeNet
- Thesaurus that allows for searches word relations searches
- Library of Congress Thesauri
- Maintained by the Library of the United States Congress
- Merriam-Webster Online Thesaurus
- Maintained by one of the foremost publishers of reference meterials in the United States
- Synonym.com
- Look up for synonyms and antonyms in English
- Thesaurus.com
- Free online Thesaurus
- Wordsmyth
- Dictionary and thesaurus
- Yahoo Thesaurus
- From Yahoo Reference site