- Definitions|2
- Thesaurus|2k
- Abbreviations|0
| imprudent(weak, simple, silly, foolish, stupid) | |
| incautious(weak, simple, silly, foolish, thoughtless) | |
| inept | |
| infatuated | |
| injudicious(weak, simple, silly, foolish, unreasonable) | |
| irresolute(adjective, careless, silly, unsteady, inconstant) | |
| irresponsible(foolish, stupid, absurd, unsteady, half-baked) | |
| knuckle-headed(adjective, foolish) | |
| lackbrained | |
| lame-brained(adjective, foolish) | |
| lamebrain | |
| lean-minded | |
| lean-witted | |
| light-headed | |
| lumpen | |
| lunatic(weak, simple, silly, foolish, thoughtless) | |
| lunkheaded | |
| maudlin | |
| meaningless(dull, silly, foolish, stupid, absurd) | |
| meat-headed(adjective, foolish) |
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| APA | Smart Define. (2016). brainless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/brainless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "brainless thesaurus" https://smartdefine.org/brainless/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, brainless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/brainless/thesaurus/synonyms>. |
| MLA | Smart Define. "brainless thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/brainless/thesaurus/synonyms> |