Datamuse
FreeLiveLast verified 24 Sept 2026
Finds words matching meaning, sound, spelling pattern or related-word constraints for language tools.
Example request
curl -s 'https://api.datamuse.com/words?ml=ringing+in+the+ears'
Free tier, in plain English
Free to use with no signup, up to 100,000 requests a day; an API key becomes required for the same quota starting 2027.
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