- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
50 entries under illogical topic. ×
| baseless(adjective, reason, poor, foolish, true) | |
| unfounded(adjective, reason, foolish, true, crazy) | |
| unsound(adjective, foolish, unreasonable, error, reasoning) | |
| idle(adjective, reason, false, true, worthless) | |
| unjustified(adjective, reason, unwarranted, untrue, justification) | |
| unreasonable(adjective, poor, foolish, reasoning, irrational) | |
| fallacious(adjective, poor, foolish, unreasonable, error) | |
| bottomless(adjective, reason, false, true, senseless) | |
| absurd(adjective, foolish, unreasonable, irrational) | |
| invalid(foolish, unreasonable, reasoning, irrational) | |
| irrational(adjective, foolish, unreasonable, defended) | |
| ridiculous(adjective, foolish, unreasonable, defended) | |
| sophistic(adjective, foolish, unreasonable, irrational) | |
| specious(adjective, foolish, unreasonable, irrational) | |
| vain(adjective, false, empty, worthless, untrue) | |
| crazy(foolish, unreasonable) | |
| foolish(adjective, unreasonable) | |
| foundationless(adjective, reason, false, unwarranted, untrue) | |
| mad(foolish, unreasonable, irrational, unreasoned) | |
| nutty(foolish, unreasonable, irrational, unreasoned) |
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| APA | Smart Define. (2015). groundless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/groundless/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "groundless thesaurus" https://smartdefine.org/groundless/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, groundless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/groundless/thesaurus/synonyms>. |
| MLA | Smart Define. "groundless thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/groundless/thesaurus/synonyms> |