| on slippery ground(expression, adjective, idiom, delicate, uncertain) | |
| on the fence(adjective, undecided) | |
| on the spot(expression, idiom, delicate, uncertain, sensitive) | |
| on trial | |
| open for consideration | |
| open to doubt(expression, idiom) | |
| open to question(expression, idiom) | |
| out on a limb(expression, idiom, delicate, uncertain, doubtful) | |
| outside chance(expression, doubtful, unlikely, implausible) | |
| pending(open, uncertain, shaky, vague, unsure) | |
| playing with fire(expression, idiom, delicate, uncertain, sensitive) | |
| pregnable(adjective, unreliable, insecure, treacherous, incalculable) | |
| probationary | |
| provisional | |
| provisionary | |
| provisory(adjective, conditional) | |
| random(adjective, changeable, erratic) | |
| refutable | |
| rickety | |
| rootless(adjective, uncertain, nervous, doubtful, shaky) |
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| APA | Smart Define. (2015). iffy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/iffy/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "iffy thesaurus" https://smartdefine.org/iffy/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, iffy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/iffy/thesaurus/synonyms>. |
| MLA | Smart Define. "iffy thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/iffy/thesaurus/synonyms> |