- Definitions|2
- Thesaurus|982
- Abbreviations|0
| wild(adjective, foolish, unreasonable, illogical) | |
| empty | |
| ill-founded(adjective, worthless, unacceptable, inoperative, incapacitated) | |
| needless(unwarranted, unnecessary, wanton, unjustified, unfounded) | |
| reasonless(adjective, false, foolish, crazy, unreasonable) | |
| sophistic(adjective, foolish, unreasonable, worthless, unacceptable) | |
| specious(adjective, foolish, unreasonable, illogical) | |
| speculative(adjective, unsubstantiated, unsupported, unfounded, groundless) | |
| unreasonable(adjective, poor, foolish, worthless, unwarranted) | |
| unsubstantial(unsubstantiality, inexistence) | |
| unsupportable(adjective, senseless, unwarranted, wanton, superfluous) | |
| without foundation(expression, adjective, idiom, unsubstantiality) | |
| dead | |
| deceptive | |
| erroneous | |
| fallacious(adjective, poor, foolish, unreasonable, untrue) | |
| foundationless(adjective, false, unwarranted, untrue, illogical) | |
| insupportable | |
| loose | |
| nonexistent(adjective, real, fictional) |
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| APA | Smart Define. (2015). baseless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/baseless/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "baseless thesaurus" https://smartdefine.org/baseless/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, baseless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/baseless/thesaurus/synonyms>. |
| MLA | Smart Define. "baseless thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/baseless/thesaurus/synonyms> |