114 entries under expression topic. ×
| up in the air(adjective, idiom, open, uncertain) | |
| without a clue(idiom, confused, lost, perplexed) | |
| without belief(adjective, uncertain, careful, hesitant) | |
| worried sick(adjective, uncertain, anxious, nervous) | |
| at a loss(idiom, confused, lost, perplexed) | |
| at sea(confused, lost, perplexed, bewildered) | |
| unheard of(verb, phrasal verb, unlikely, implausible) | |
| all at sea(idiom, perplexed, bewildered, mystified) | |
| be doubtful(idiom, unbelief doubt) | |
| be unintelligible(idiom, unintelligibility) | |
| beyond wildest dreams(idiom, singular) | |
| bizarre uncomformable(idiom, improbability) | |
| clearness of mind | |
| entertain doubts(idiom, unbelief doubt) | |
| far from certain(idiom, questionable, debatable) | |
| far out(unreasonable, dubious, unlikely, flimsy) | |
| fly ball(unusual, strange, unexpected) | |
| from left field(idiom, changeable, erratic, random) | |
| hanging by thread(idiom, uncertain, nervous, insecure) | |
| harbor doubts(idiom, unbelief doubt) |
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| APA | Smart Define. (2016). doubtful thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/doubtful/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, doubtful thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/doubtful/thesaurus/synonyms>. |
| MLA | Smart Define. "doubtful thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/doubtful/thesaurus/synonyms> |