- Definitions|1
- Thesaurus|124
- Abbreviations|0
| unsubstantiated(adjective, unwarranted, untrue, flimsy, questionable) | |
| unconfirmed(adjective, unwarranted, untrue, flimsy, unsubstantiated) | |
| unsupported | |
| groundless(adjective, unwarranted, untrue, flimsy, unsubstantiated) | |
| unfounded(adjective, unwarranted, untrue, flimsy, unsubstantiated) | |
| unproven(adjective, unsubstantiated, unconfirmed) | |
| baseless(adjective, substantiation) | |
| unofficial(adjective, unauthorized) | |
| not proved(expression, idiom) | |
| unverified(adjective, unsubstantiated, unconfirmed) | |
| unwarranted(adjective, untrue, flimsy, unsubstantiated, unfounded) | |
| apocryphal | |
| bottomless(adjective, unwarranted, untrue, flimsy, unsubstantiated) | |
| doubtful(adjective, unsubstantiated, unconfirmed) | |
| flimsy(adjective, unwarranted, untrue, unsubstantiated, unfounded) | |
| foundationless(adjective, unwarranted, untrue, flimsy, unsubstantiated) | |
| gratuitous(adjective, unwarranted, untrue, flimsy, unsubstantiated) | |
| hard to believe(expression, adjective, idiom, unsubstantiated, unconfirmed) | |
| inconclusive | |
| indecisive |
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| APA | Smart Define. (2015). uncorroborated thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/uncorroborated/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "uncorroborated thesaurus" https://smartdefine.org/uncorroborated/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, uncorroborated thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/uncorroborated/thesaurus/synonyms>. |
| MLA | Smart Define. "uncorroborated thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/uncorroborated/thesaurus/synonyms> |