6
positively(adverb, absolutely, really, clearly, definitely)
6
predestined
6
resolute(adjective, calm, close, strong, secure)
6
right(adjective, adverb, close, correct, exact)
6
settled(adjective, strong, easy, flat, firm)
6
substantial(adjective, calm, strong, secure, continue)
6
tried(adjective, good, close, strong, correct)
6
trusted
6
ultimate(adjective, ideal, all time, the best)
6
unchallenged(adjective, ideal, all time, the best)
6
unchanging(adjective, close, set, clear, correct)
6
unflinching(adjective, strong, flat, certain, determined)
6
unshakable(adjective, strong, continue, solid, certain)
6
valid(adjective, clear, complete, correct, pure)
6
yes(adverb, interjection, fine, just, absolutely)
5
authentic(adjective, close, correct, total, exact)
5
certified(adjective, test, expert, reliable)
5
definitive(adjective, clear, plain, certain, limited)
5
emphatic(adjective, complete, flat, warm, total)
5
hopeful(adjective, strong, certain, definite, hopeful)
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APASmart Define. (2016). sure thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sure/thesaurus/synonyms
ChicagoSmart Define. 2016. "sure thesaurus" https://smartdefine.org/sure/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, sure thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sure/thesaurus/synonyms>.
MLASmart Define. "sure thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/sure/thesaurus/synonyms>