- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
| hypothetical | |
| ill-founded | |
| inconclusive | |
| inconsiderate | |
| reckless | |
| suppositional | |
| tenuous(adjective, poor, negative, implausible, vacant) | |
| uncorroborated | |
| unproved(adjective, reasoning) | |
| unproven | |
| unprovoked(adjective, reason, senseless, unwarranted, reckless) | |
| unsubstantial(adjective, error, unsubstantiality) | |
| unsupportable(adjective, senseless, unwarranted, wanton, gratuitous) | |
| unverified | |
| without foundation(expression, adjective, idiom, unsubstantiality) | |
| crazy(foolish, unreasonable, illogical) | |
| faulty | |
| flawed | |
| foolish(adjective, unreasonable, illogical) | |
| foundationless(adjective, reason, false, unwarranted, untrue) |
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| APA | Smart Define. (2015). groundless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/groundless/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "groundless thesaurus" https://smartdefine.org/groundless/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, groundless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/groundless/thesaurus/synonyms>. |
| MLA | Smart Define. "groundless thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/groundless/thesaurus/synonyms> |