50 entries under adjective topic. ×
| foolish | |
| half-witted | |
| idiotic | |
| ignorant | |
| imbecilic | |
| inane | |
| indistinct | |
| knavish | |
| listless | |
| lumpish | |
| moronic | |
| mute | |
| opaque | |
| preposterous | |
| retarded | |
| sheepish | |
| silent | |
| simple-minded | |
| slow-witted | |
| speechless |
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| APA | Smart Define. (2016). brain thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/brain/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "brain thesaurus" https://smartdefine.org/brain/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, brain thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/brain/thesaurus/antonyms>. |
| MLA | Smart Define. "brain thesaurus" 19 February 2016. Web. 24 September 2026. <https://smartdefine.org/brain/thesaurus/antonyms> |