11
several(adjective, single, alone, isolation, apart)
11
singular(adjective, separate, exact, extraordinary, superior)
11
transparency
11
veracity
10
actual(adjective, clear, correct, honest, total)
10
assertive(adjective, firm, energetic, sure, aggressive)
10
decisive(adjective, good, clear, strong, firm)
10
fated(adjective, determined, restrained, definite, distinct)
10
irrefragable(adjective, ideal, all time, the best)
10
plain(adjective, clear, flat, firm, honest)
10
real(adjective, clear, correct, honest, pure)
10
safe(adjective, good, clear, strong, sound)
10
unavoidable(adjective, regular, obvious, bound, coming)
9
clear-cut(adjective, clear, plain, solid, exact)
9
constant(adjective, good, strong, complete, firm)
9
genuine(adjective, clear, correct, honest, true)
9
guaranteed(adjective, definite, fixed, sure, positive)
9
inarguable(adjective, certain, true, ideal, all time)
9
sound(noun, adjective, clear, strong, easy)
9
steady(adjective, good, strong, complete, easy)
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APASmart Define. (2016). certain thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/certain/thesaurus/synonyms
ChicagoSmart Define. 2016. "certain thesaurus" https://smartdefine.org/certain/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, certain thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/certain/thesaurus/synonyms>.
MLASmart Define. "certain thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/certain/thesaurus/synonyms>