80 entries under sure topic. ×

4
self-assertive(adjective, rude, arrogant, presuming)
4
self-assured(adjective, rude, certain, confident)
4
swaggering(adjective, certain, arrogant, haughty)
3
careless(adjective, arrogant)
3
cool(rude, certain, impudent, haughty)
2
assertive(certain, guaranteed)
2
decided(certain, guaranteed)
2
irrefutable(adjective, certain, guaranteed)
2
poised(certain, confident, self-confident, guaranteed)
2
secure(certain, confident, self-confident, guaranteed)
2
unhesitating(certain, guaranteed)
2
vain(adjective, certain, arrogant, haughty)
1
bumptious(adjective, cool, rude, certain)
1
certain(adjective, arrogant, self-assured, guaranteed)
1
complacent(adjective, certain, guaranteed)
1
definite(adjective, certain, guaranteed)
1
in the bag(expression, idiom, certain, guaranteed)
1
know-it-all(certain, arrogant, haughty, self-assured)
1
lordly(certain, arrogant, haughty, self-assured)
1
puffed up(expression, certain, confident, haughty)
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APASmart Define. (2015). overconfident thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/overconfident/thesaurus/synonyms
ChicagoSmart Define. 2015. "overconfident thesaurus" https://smartdefine.org/overconfident/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, overconfident thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/overconfident/thesaurus/synonyms>.
MLASmart Define. "overconfident thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/overconfident/thesaurus/synonyms>