117 entries under vague topic. ×
| irregular(unusual, strange, dubious, changeable) | |
| loose(adjective, rough, unknown, unclear) | |
| misleading(adjective, uncertain, faint, dubious) | |
| on thin ice(expression, adjective, idiom, open, delicate) | |
| opaque(uncertain, unclear) | |
| putative(uncertain, imaginary, theoretical, supposed) | |
| supposed(uncertain, imaginary, theoretical, assumed) | |
| suppositious(uncertain, imaginary, theoretical, supposed) | |
| tenebrous(uncertain, unclear, ambiguous, misleading) | |
| touch and go(expression, adjective, idiom, delicate, uncertain) | |
| unexplicit(unclear, ambiguous, misleading, indistinct) | |
| unintelligible(dark, uncertain, unclear, ambiguous) | |
| unknown(adjective, rough, uncertain, unsettled) | |
| up for grabs(expression, adjective, idiom, uncertain) | |
| up in the air(expression, adjective, idiom, open, uncertain) | |
| waffling(adjective, open, weak, uncertain, unsettled) | |
| academic(uncertain, imaginary, theoretical, supposed) | |
| amphibological(unclear, ambiguous, misleading, indistinct) | |
| assumed(uncertain, imaginary, theoretical, supposed) | |
| abstruse(uncertain, unclear) |
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| APA | Smart Define. (2016). doubtful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/doubtful/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, doubtful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/doubtful/thesaurus/synonyms>. |
| MLA | Smart Define. "doubtful thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/doubtful/thesaurus/synonyms> |