17
belief
17
clarity
17
clearness
17
distinctness
17
explicitness
17
guarantee
17
limpidity
17
obviousness
17
particular(adjective, correct, exact, extraordinary, superior)
17
persuasion
17
self-assurance
17
unambiguous(adjective, clear, firm, plain, perfect)
17
verity
16
decided(adjective, clear, firm, solid, perfect)
16
undisputed(adjective, ideal, accepted, all time, the best)
15
categorical(adjective, clear, complete, flat, total)
15
firm(noun, adjective, good, change, clear)
15
individual(adjective, exact, extraordinary, superior, unusual)
15
infallible(adjective, reliable, trustworthy, valid, dependable)
15
obvious(adjective, definite, sure, evident, indisputable)
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APASmart Define. (2016). certain thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/certain/thesaurus/synonyms
ChicagoSmart Define. 2016. "certain thesaurus" https://smartdefine.org/certain/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, certain thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/certain/thesaurus/synonyms>.
MLASmart Define. "certain thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/certain/thesaurus/synonyms>