35 entries under sure topic. ×

18
clear(adjective, certain, definite, positive, characteristic)
18
collected(adjective, calm, relaxed, tranquil, easygoing)
18
composed(adjective, characteristic, calm, quiet, quality)
16
undoubting(adjective, certain, characteristic, set)
15
presumptuous(adjective, certain, self-assured, assured, brash)
15
audacious(adjective, strong, smart, solid, rude)
10
definite(adjective, clear, strong, easy, firm)
7
decided(verb, adjective, clear, firm, energetic)
7
indisputable(adjective, clear, certain, definite)
6
absolute(adjective, clear, strong, easy, firm)
6
decisive(adjective, clear, firm, certain)
2
have no doubt(expression, feeling, show)
2
hold the unwavering view(expression, feeling, show)
2
not question(expression, feeling, show)
1
persuaded(adjective, feeling, show)
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APASmart Define. (2016). confident thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/confident/thesaurus/synonyms
ChicagoSmart Define. 2016. "confident thesaurus" https://smartdefine.org/confident/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, confident thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/confident/thesaurus/synonyms>.
MLASmart Define. "confident thesaurus" 23 March 2016. Web. 25 September 2026. <https://smartdefine.org/confident/thesaurus/synonyms>