Synonyms|1.3kAntonyms|436|Broader|10Narrower|26Related|2.3k
2
questionable
2
shady
2
unconfident(adjective, calm, quiet)
2
unsafe(strong, secure)
2
unsettled
2
unstable(adjective, clear, sound, steady)
2
untrustworthy
2
variable
2
weak(adjective, firm, powerful, healthy)
2
wobbly(adjective, sound, steady)
1
arcane
1
baseless
1
capricious
1
careless
1
contingent(adjective, possible, conditional)
1
controversial
1
controvertible
1
dicey(adjective, safe, risky)
1
disputable
1
distrustful
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APASmart Define. (2016). sure thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sure/thesaurus/antonyms
ChicagoSmart Define. 2016. "sure thesaurus" https://smartdefine.org/sure/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, sure thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sure/thesaurus/antonyms>.
MLASmart Define. "sure thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/sure/thesaurus/antonyms>