132 entries under doubtful topic. ×
| undependable(adjective, uncertain, nervous, dubious) | |
| unsafe(adjective, delicate, uncertain, sensitive, unstable) | |
| clouded(adjective, clear, certain, uncertain) | |
| contingent(adjective, delicate, uncertain, unstable) | |
| delicate(adjective, uncertain, sensitive, unstable) | |
| fishy(adjective, uncertain, shaky, dubious) | |
| fluctuant(adjective, uncertain, nervous, irregular) | |
| fly-by-night(adjective, uncertain, nervous, dubious) | |
| improbable(adjective, uncertain, shaky, likely) | |
| inconclusive(adjective, clear, certain, uncertain) | |
| rocky(adjective, delicate, uncertain, sensitive, unstable) | |
| shady(adjective, uncertain, shaky, dubious) | |
| slippery(adjective, delicate, uncertain, unstable) | |
| unassured(adjective, uncertain, nervous, dubious) | |
| variable(adjective, uncertain, irregular, vague) | |
| weak(adjective, uncertain, nervous, insecure) | |
| arguable(uncertain, dubious, tricky, questionable) | |
| conjectural(unsettled, vague, unsure, indefinite) | |
| flimsy(adjective, unlikely, implausible, unsubstantiated) | |
| on thin ice(expression, adjective, idiom, delicate, uncertain) |
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| APA | Smart Define. (2015). iffy thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/iffy/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "iffy thesaurus" https://smartdefine.org/iffy/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, iffy thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/iffy/thesaurus/synonyms>. |
| MLA | Smart Define. "iffy thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/iffy/thesaurus/synonyms> |