69 entries under questionable topic. ×
| shady(adjective, open, honest, unusual, strange) | |
| unlikely(adjective, slight, uncertain, shaky, dubious) | |
| unreliable(adjective, delicate, uncertain, nervous, unstable) | |
| borderline(adjective, clear, open, delicate, certain) | |
| indistinct(adjective, obscure, rough, uncertain, dim) | |
| chancy(noun, adjective, clear, delicate, certain) | |
| indeterminate(adjective, clear, obscure, rough, certain) | |
| arguable(noun, adjective, certain, uncertain, unsettled) | |
| controversial(noun, adjective, uncertain, hot, unsettled) | |
| disreputable(adjective, dishonest, vague, dubious, unclear) | |
| insecure(adjective, delicate, uncertain, awkward, nervous) | |
| precarious(adjective, uncertain, unstable, shaky, vague) | |
| shaky(adjective, weak, delicate, uncertain, anxious) | |
| unpredictable(noun, adjective, uncertain, shy, vague) | |
| clouded(adjective, clear, certain, uncertain, vague) | |
| far-fetched(adjective, hard, extraordinary, uncertain, fantastic) | |
| hazy(adjective, uncertain, shaky, vague, unclear) | |
| open(adjective, uncertain, nervous, unstable, unsettled) | |
| unstable(adjective, weak, delicate, uncertain, nervous) | |
| speculative(adjective, uncertain, vague, unclear, interested) |
For more, visit
Doubtful on
Power Thesaurus
| 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> |