551 entries under adjective topic. ×

6
trusted
6
ultimate(ideal, all time, the best)
6
unchallenged(ideal, all time, the best)
6
unchanging(close, set, clear, correct)
6
unflinching(strong, flat, certain, determined)
6
unshakable(strong, continue, solid, certain)
6
valid(clear, complete, correct, pure)
5
authentic(close, correct, total, exact)
5
certified(test, expert, reliable)
5
definitive(clear, plain, certain, limited)
5
emphatic(complete, flat, warm, total)
5
hopeful(strong, certain, definite, hopeful)
5
inexorable(certain, resolute, persistent, obvious)
5
persuaded(verb, certain, definite, unquestionable)
5
predetermined
5
protected(certain, definite, safe, safety)
5
self-assured(strong, firm, certain, definite)
5
surefire(solid, certain, definite, constant)
5
tried and true(expression, idiom, close, strong)
5
uncompromising(certain, definite, fixed, rigid)
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APASmart Define. (2016). sure thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sure/thesaurus/synonyms
ChicagoSmart Define. 2016. "sure thesaurus" https://smartdefine.org/sure/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, sure thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sure/thesaurus/synonyms>.
MLASmart Define. "sure thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/sure/thesaurus/synonyms>