Synonyms|239Antonyms|51|Broader|0Narrower|0Related|53

57 entries under adjective topic. ×

7
certain(sure, reliable, trustworthy, unquestionable)
6
sure(solid, certain, definite, constant)
6
infallible(certain, reliable, trustworthy, dependable)
6
unfailing(certain, reliable, trustworthy, unquestionable)
5
dependable(solid, certain, sure, constant)
4
reliable
2
incontrovertible(certain, unquestionable, undeniable, undisputable)
2
indubitable(solid, certain, definite, sure)
2
secure(set, solid, certain, sure)
1
absolutely certain(expression, set, solid, certain)
1
accurate(certain, established, unquestionable, undisputable)
1
beyond doubt(expression, set, solid, certain)
1
cinched(set, firm, solid, certain)
1
clear-cut(set, solid, certain, sure)
1
clinched(set, solid, certain, sure)
1
confirmed(set, solid, certain, sure)
1
decided(set, solid, certain, definite)
1
definite(solid, certain, sure, confident)
1
ensured(set, solid, certain, sure)
1
fixed(set, solid, certain, definite)
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ChicagoSmart Define. 2015. "surefire thesaurus" https://smartdefine.org/surefire/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, surefire thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/surefire/thesaurus/synonyms>.
MLASmart Define. "surefire thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/surefire/thesaurus/synonyms>