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I am looking for a database of English synonyms or thesaurus (text file or anything convertible to it or web service with API). Please, don't offer a word-by-word websites (like synonym.com).

Any help is welcome.

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closed as off topic by Sathya May 12 '13 at 14:23

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2 Answers 2

up vote 5 down vote accepted

Here is a list of APIs that can be used the following way to retrieve synonyms:

  1. API call: http://words.bighugelabs.com/api/2/{api key}/hello/json

    The details are here: http://words.bighugelabs.com/api.php

  2. API call: http://api-pub.dictionary.com/v001?vid=<VID>&q=hello&type=synonyms

    the details are here: http://content.dictionary.com/api (Note: "We are selective about our API partners and approve use as well as develop terms on a case-by-case basis.")

  3. API call: http://www.abbreviations.com/services/v1/syno.aspx?tokenid={token}&word=hello

    the details are here: http://www.abbreviations.com/synonyms_api.php (see also its entry on programmableweb.com)

  4. API call: http://watson.kmi.open.ac.uk/API/term/synonyms?term=hello

    the details are here: http://watson.kmi.open.ac.uk/API/explain-syn.html

  5. API call: http://thesaurus.altervista.org/thesaurus/v1?word=hello&language=en_US&key={key}&output=json

    the details are here: http://thesaurus.altervista.org/

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Great list! The Princeton Wordnet website also has a list that might be useful: wordnet.princeton.edu/wordnet/related-projects/#web –  waldyrious May 12 '13 at 10:34

Check out this post on stackoverflow; it has a lot of good information on synonym web services.

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+1 Emmy, I thank you for the reference and answer. –  igor Nov 11 '10 at 21:34

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