- Definitions|2
- Thesaurus|4.1k
- Abbreviations|0
123 entries under doubtful topic. ×
| unsubstantial(extraordinary, amazing, unlikely, implausible) | |
| up for grabs(expression, idiom, shaky, vague) | |
| up in the air(expression, adjective, idiom, uncertain) | |
| contrary(dubious, improbable) | |
| diffident(uncertain, unsure) | |
| faint(dubious, unclear, indistinct, indistinguishable) | |
| fitful(vague, hesitant, changeable, unsure) | |
| hanging by a thread(expression, vague, hesitant, changeable) | |
| hesitant(uncertain, vague, changeable, unsure) | |
| impracticable(unlikely, implausible) | |
| not probable(expression, dubious, improbable) | |
| out of the ordinary(expression, idiom, unusual, strange) | |
| perplexed(uncertain, unsure) | |
| pseudo(adjective, dubious, unpredictable, fickle) | |
| questioning(uncertain, unsure) | |
| reluctant(uncertain, unsure) | |
| skeptical(uncertain, unsure) | |
| slight(dubious, improbable) | |
| unfixed(adjective, vague, hesitant, changeable) | |
| unforeseeable(vague, hesitant, changeable, unsure) |
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| APA | Smart Define. (2015). questionable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/questionable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "questionable thesaurus" https://smartdefine.org/questionable/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, questionable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/questionable/thesaurus/synonyms>. |
| MLA | Smart Define. "questionable thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/questionable/thesaurus/synonyms> |