Dictionaries — entry 009 of 12
Synonyms
The Synonyms API is STANDS4 Network's word-lookup service, returning synonym, antonym, and part-of-speech data for a submitted word as either JSON or XML from a single GET request against stands4.com's shared services endpoint — the same backend that powers sibling STANDS4 properties like Rhymes.com and Definitions.net. A live GET and OPTIONS preflight against that endpoint both echoed `access-control-allow-origin: *`; the service is free for up to 100 queries/day, with a paid commercial license available by contacting STANDS4 directly.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSON, XMLResponses can be requested as JSON or XML.
GreatAPIs Score
Score67
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs0/20No docs or spec available
Formats15/15Supports 2 response formats
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/synonyms/"><img src="https://greatapis.com/badge/synonyms.svg" alt="Scored 67 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.