75 entries under confident topic. ×

13
settled(adjective, strong, easy, firm, solid)
13
trustworthy(adjective, good, clear, strong, sound)
13
undoubted(adjective, correct, firm, solid, physical)
12
cinch(noun, adjective, strong, easy, solid)
12
satisfied(adjective, set, clear, firm, content)
12
unmistakable(adjective, clear, correct, firm, total)
10
assertive(adjective, firm, energetic, sure, aggressive)
10
plain(adjective, clear, flat, firm, honest)
10
safe(adjective, good, clear, strong, sound)
9
clear-cut(adjective, clear, plain, solid, exact)
9
sound(noun, adjective, clear, strong, easy)
7
steadfast(adjective, good, strong, complete, easy)
7
undoubting(adjective, set, clear, firm, sure)
6
confirmed(adjective, solid, determined, usual, regular)
6
sanguine(adjective, strong, easy, firm, solid)
6
self-confident(adjective, strong, easy, firm, solid)
6
solid(adjective, good, strong, sound, correct)
5
cocksure(adjective, clear, sure, arrogant)
4
believing(adjective, firm, sure, positive)
4
calm(adjective, firm, solid, stable, fixed)
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APASmart Define. (2016). certain thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/certain/thesaurus/synonyms
ChicagoSmart Define. 2016. "certain thesaurus" https://smartdefine.org/certain/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, certain thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/certain/thesaurus/synonyms>.
MLASmart Define. "certain thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/certain/thesaurus/synonyms>