- Definitions|1
- Thesaurus|1.5k
- Abbreviations|0
| uncorroborated(adjective, questionable, unproven) | |
| unsupported(adjective, questionable, unproven) | |
| groundless | |
| unfounded | |
| unproven(adjective, untrue, risky, illogical, theoretical) | |
| baseless(adjective, substantiation) | |
| unconfirmed(adjective, questionable, unproven) | |
| shaky | |
| unverified(adjective, untrue, inaccurate, unconfirmed, uncorroborated) | |
| doubtful(adjective, questionable, unproven) | |
| dubious(adjective, questionable, unproven) | |
| theoretical(adjective, hypothetical) | |
| uncertain(adjective, questionable, unproven) | |
| unproved | |
| apocryphal(adjective, fake, questionable) | |
| debatable(adjective, questionable, unproven) | |
| fallacious(adjective, false, untrue, illogical, inaccurate) | |
| indefinite(adjective, questionable, unproven) | |
| suspect(adjective, questionable, unproven) | |
| suspicious(adjective, questionable, unproven) |
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| APA | Smart Define. (2016). unsubstantiated thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unsubstantiated/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unsubstantiated thesaurus" https://smartdefine.org/unsubstantiated/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, unsubstantiated thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unsubstantiated/thesaurus/synonyms>. |
| MLA | Smart Define. "unsubstantiated thesaurus" 3 February 2016. Web. 21 September 2026. <https://smartdefine.org/unsubstantiated/thesaurus/synonyms> |