Synonyms API alternatives
10 other dictionaries APIs compared on authentication, HTTPS, CORS and documented endpoints.
| API | Auth | HTTPS | CORS | Endpoints |
|---|---|---|---|---|
| Synonyms | API key | Yes | Unknown | — |
| Oxford | API key | Yes | No | 26 |
| Wordnik | API key | Yes | Unknown | 16 |
| Collins | API key | Yes | Unknown | — |
| Free Dictionary | No auth | Yes | Unknown | — |
| WordSoHard | No auth | Yes | Yes | — |
| Chinese Character Web | No auth | No | No | — |
| SayItVid | API key | Yes | Yes | — |
| Merriam-Webster | API key | Yes | Unknown | — |
| Words | API key | Yes | Unknown | — |
| Random Lexicon | No auth | Yes | Yes | — |
Oxford
DictionariesThe Oxford Dictionaries API gives you access to our world-renowned dictionary data, including definitions, translations, synonyms, and audio pronunciations.
API key26 endpoints
Wordnik
DictionariesThe Wordnik API: All the words
API key16 endpoints
Collins
DictionariesBilingual Dictionary and Thesaurus Data
API key
Free Dictionary
DictionariesDefinitions, phonetics, pronunciations, parts of speech, examples, synonyms
No auth
WordSoHard
DictionariesWord definitions with Scrabble validity and tile score in one call, built for word games
No authCORS
Chinese Character Web
DictionariesChinese character definitions and pronunciations
No auth
SayItVid
DictionariesEnglish video pronunciation search with timestamps, IPA phonetics and subtitle context
API keyCORS
Merriam-Webster
DictionariesDictionary and Thesaurus Data
API key
Words
DictionariesDefinitions and synonyms for more than 150,000 words
API key
Random Lexicon
DictionariesRandom words and definitions using optional filters
No authCORS