| dubious(adjective, clear, obscure, certain, uncertain) | |
| doubtful(adjective, clear, obscure, certain, uncertain) | |
| dubitable(adjective, clear, obscure, certain, uncertain) | |
| in dispute | |
| problematic(adjective, clear, obscure, certain, uncertain) | |
| questionable(adjective, clear, weak, obscure, certain) | |
| arguable(adjective, unsettled, undecided) | |
| debatable(adjective, uncertain, unsettled, dubious, equivocal) | |
| moot(adjective, uncertain, unsettled, dubious, undecided) | |
| problematical(adjective, clear, certain, ambiguous) | |
| ambiguous(adjective, clear, obscure, certain, uncertain) | |
| at issue(expression, adjective, idiom) | |
| controversial(adjective, unsettled, undecided) | |
| disputable | |
| uncertain(adjective, clear, weak, obscure, certain) | |
| under consideration | |
| controvertible | |
| in doubt(adjective, obscure, uncertain, anxious, doubtful) | |
| open(adjective, uncertain, unsettled, dubious, undecided) | |
| suspect |
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| APA | Smart Define. (2015). in question thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/in_question/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "in question thesaurus" https://smartdefine.org/in_question/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, in question thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/in_question/thesaurus/synonyms>. |
| MLA | Smart Define. "in question thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/in_question/thesaurus/synonyms> |