- Definitions|1
- Thesaurus|2.3k
- Abbreviations|0
| inapt | |
| incautious(weak, simple, silly, foolish, thoughtless) | |
| inconsistent(adjective, simple, silly, foolish, stupid) | |
| indiscreet(adjective, dull, weak, simple, silly) | |
| inefficient | |
| innocent | |
| insensitive | |
| irresponsible(foolish, stupid, rash, risky, dumb) | |
| know-nothing | |
| knuckleheaded | |
| kooky(weak, simple, silly, foolish, thoughtless) | |
| lackbrained | |
| lamebrain | |
| lean-minded | |
| lean-witted | |
| lightheaded(adjective, mind, think) | |
| loony(weak, simple, silly, foolish, thoughtless) | |
| lumpen | |
| lunatic(weak, simple, silly, foolish, crazy) | |
| lunkheaded |
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| APA | Smart Define. (2016). unintelligent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unintelligent/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unintelligent thesaurus" https://smartdefine.org/unintelligent/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, unintelligent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unintelligent/thesaurus/synonyms>. |
| MLA | Smart Define. "unintelligent thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/unintelligent/thesaurus/synonyms> |