120 entries under clear topic. ×

3
outright(adjective, complete, flat, total)
3
persuaded(adjective, definite, unquestionable, undisputable)
3
unmitigated(adjective, complete, flat, total)
3
unquestioning(adjective, set, firm, solid)
2
concrete(adjective, correct, exact, physical)
2
correct(adjective, plain, exact, proper)
2
direct(adjective, plain, energetic, definite)
2
forceful(adjective, firm, energetic, sure)
2
lucid(adjective, plain, obvious, unequivocal)
2
never-failing(adjective, set, complete, firm)
2
open(flat, total, plain, true)
2
perspicuous(adjective, plain, obvious, understandable)
2
simple(adjective, complete, flat, total)
2
telling(energetic, definite, sure, decisive)
2
unreserved(adjective, complete, firm, total)
2
unshakable(adjective, complete, firm, definite)
2
unvarying(adjective, set, firm, solid)
1
abiding(adjective, set, complete, firm)
1
checked(adjective, sound, pure, healthy)
1
competent(adjective, sound, pure, healthy)
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APASmart Define. (2016). certain thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/certain/thesaurus/synonyms
ChicagoSmart Define. 2016. "certain thesaurus" https://smartdefine.org/certain/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, certain thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/certain/thesaurus/synonyms>.
MLASmart Define. "certain thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/certain/thesaurus/synonyms>