3
controversial
3
delicate(adjective, uncertain, sensitive, unstable, doubtful)
3
dependent
3
fishy(adjective, uncertain, doubtful, shaky, dubious)
3
fluctuant(adjective, uncertain, nervous, irregular, doubtful)
3
fly-by-night(adjective, uncertain, nervous, doubtful, dubious)
3
improbable(adjective, uncertain, doubtful, shaky, likely)
3
in doubt(expression, adjective, idiom, clear, open)
3
in question(adjective, idiom, clear, certain)
3
inconclusive(adjective, clear, certain, uncertain, doubtful)
3
rocky(adjective, delicate, uncertain, sensitive, unstable)
3
shady(adjective, uncertain, doubtful, shaky, dubious)
3
slippery(adjective, delicate, uncertain, unstable, doubtful)
3
unassured(adjective, uncertain, nervous, doubtful, dubious)
3
unsound(adjective, delicate, uncertain, sensitive, risky)
3
variable(adjective, uncertain, irregular, doubtful, vague)
3
weak(adjective, uncertain, nervous, doubtful, insecure)
2
arguable(uncertain, doubtful, dubious, tricky, questionable)
2
at issue(adjective, idiom, clear, certain)
2
chanceful
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APASmart Define. (2015). iffy thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/iffy/thesaurus/synonyms
ChicagoSmart Define. 2015. "iffy thesaurus" https://smartdefine.org/iffy/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, iffy thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/iffy/thesaurus/synonyms>.
MLASmart Define. "iffy thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/iffy/thesaurus/synonyms>