59 entries under unlikely topic. ×
| uncertain(noun, adjective, clear, open, weak) | |
| dubious(noun, adjective, clear, open, great) | |
| questionable(noun, adjective, clear, great, obscure) | |
| debatable(noun, adjective, open, certain, uncertain) | |
| indefinite(adjective, open, obscure, rough, uncertain) | |
| problematic(adjective, clear, open, rough, delicate) | |
| suspect(verb, adjective, great, honest, extraordinary) | |
| iffy(noun, adjective, clear, open, delicate) | |
| ambiguous(adjective, clear, open, obscure, rough) | |
| dubitable(adjective, clear, certain, uncertain, unsettled) | |
| fishy(adjective, great, honest, informal, extraordinary) | |
| obscure(adjective, rough, dark, uncertain, unreasonable) | |
| unclear(adjective, clear, open, obscure, rough) | |
| shady(adjective, open, honest, unusual, strange) | |
| improbable(adjective, extraordinary, uncertain, fantastic, dubious) | |
| borderline(adjective, clear, open, delicate, certain) | |
| incredible(adjective, great, extraordinary, unreasonable, fantastic) | |
| indistinct(adjective, obscure, rough, uncertain, dim) | |
| chancy(noun, adjective, clear, delicate, certain) | |
| implausible(adjective, extraordinary, fantastic, amazing, dubious) |
For more, visit
Doubtful on
Power Thesaurus
| APA | Smart Define. (2016). doubtful thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/doubtful/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, doubtful thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/doubtful/thesaurus/synonyms>. |
| MLA | Smart Define. "doubtful thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/doubtful/thesaurus/synonyms> |