Synonyms|1.1kAntonyms|412|Broader|17Narrower|24Related|3.7k

47 entries under adjective topic. ×

18
confident(weak, timid)
14
certain(confident, valid, undoubtable)
11
sure(certain, definite, inevitable)
9
clear(ambiguous, filled)
9
definite
7
unquestionable
6
settled
6
indisputable
6
indubitable
4
convinced
4
credible
3
inevitable(certain, distant)
3
irrefutable
3
likely
3
plausible
3
positive(certain, definite)
3
probable
3
trusting
2
confirmed
2
decided
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APASmart Define. (2016). doubtful thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/doubtful/thesaurus/antonyms
ChicagoSmart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, doubtful thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/doubtful/thesaurus/antonyms>.
MLASmart Define. "doubtful thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/doubtful/thesaurus/antonyms>