132 entries under doubtful topic. ×
| slim(unlikely, implausible) | |
| slim and none(expression, idiom, unlikely, implausible) | |
| unconfident(adjective, uncertain, nervous, shaky) | |
| unconfirmed(uncertain, unsettled, dubious, restricted) | |
| unconvinced(adjective, uncertain, nervous, hesitant) | |
| unconvincing(unlikely, implausible) | |
| unfixed(vague, unsure, immense, infinite) | |
| unhealthy(adjective, delicate, uncertain, sensitive, unstable) | |
| unheard of(expression, unlikely, implausible) | |
| unlikely(uncertain, shaky, unsure, implausible) | |
| unsubstantial(unlikely, implausible) | |
| untrusty(adjective, uncertain, nervous, hesitant) | |
| up for grabs(expression, adjective, idiom, uncertain, nervous) | |
| vague(open, uncertain, nervous, hesitant) | |
| waffling(adjective, open, uncertain, vague) | |
| wavering(adjective, open, uncertain, nervous) | |
| wimpy(adjective, uncertain, nervous, shaky) | |
| distrustful(adjective, uncertain, nervous, dubious) | |
| fanciful(unlikely, implausible) | |
| implausible |
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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> |