99 entries under doubtful topic. ×
| suppositional(uncertain, vague, academic, speculative) | |
| unclear(open, uncertain, vague, indefinite) | |
| unconfirmed(adjective, unsettled, vague, hesitant) | |
| undetermined(adjective, open, weak, uncertain) | |
| uneager(adjective, uncertain, shy, hesitant) | |
| unpredictable(adjective, uncertain, shy, vague) | |
| up in the air(expression, adjective, idiom, open, uncertain) | |
| waffling(adjective, open, weak, uncertain) | |
| weak-kneed(weak, uncertain, indefinite, wavering) | |
| wimpy(adjective, weak, uncertain, nervous) | |
| wishy-washy(open, weak, uncertain, vague) | |
| chancy(uncertain, vague, unsure) | |
| figured(uncertain, speculative) | |
| fitful(vague, unsure) | |
| guessing(uncertain, speculative) | |
| guesstimated(uncertain, speculative) | |
| hanging by a thread(expression, idiom, vague, unsure) | |
| hazy(vague, unsure) | |
| in doubt(expression, open, vague, unsure) | |
| incalculable(vague, unsure) |
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| APA | Smart Define. (2015). tentative thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/tentative/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "tentative thesaurus" https://smartdefine.org/tentative/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, tentative thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/tentative/thesaurus/synonyms>. |
| MLA | Smart Define. "tentative thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/tentative/thesaurus/synonyms> |