378 entries under adjective topic. ×
| fishy(great, honest, informal, extraordinary) | |
| indecisive(clear, open, weak, delicate) | |
| obscure(rough, dark, uncertain, unreasonable) | |
| unclear(clear, open, obscure, rough) | |
| vague(clear, open, obscure, rough) | |
| shady(open, honest, unusual, strange) | |
| improbable(extraordinary, uncertain, fantastic, dubious) | |
| in doubt(expression, idiom, clear, certain) | |
| incredulous(indecisive, skeptical, unbelieving) | |
| unlikely(slight, uncertain, shaky, dubious) | |
| unreliable(delicate, uncertain, nervous, unstable) | |
| borderline(clear, open, delicate, certain) | |
| incredible(great, extraordinary, unreasonable, fantastic) | |
| indistinct(obscure, rough, uncertain, dim) | |
| in question(expression, idiom, clear, obscure) | |
| chancy(noun, clear, delicate, certain) | |
| disbelieving(person, uncertain, hesitant, suspicious) | |
| implausible(extraordinary, fantastic, amazing, dubious) | |
| indeterminate(clear, obscure, rough, certain) | |
| mistrustful(uncertain, anxious, nervous, worried) |
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| APA | Smart Define. (2016). doubtful thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/doubtful/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, doubtful thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/doubtful/thesaurus/synonyms>. |
| MLA | Smart Define. "doubtful thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/doubtful/thesaurus/synonyms> |