| lively | |
| logical(obscure, illogical) | |
| nimble | |
| penetrative(careless, clumsy, unperceptive) | |
| perspicacious | |
| profound(adjective, open, light, thoughtful, intellectual) | |
| prompt | |
| quick-witted(adjective, smart) | |
| rational(careless, illogical) | |
| ready | |
| reasonable(adjective, sharp, intelligent, senseless, irrational) | |
| savvy(dull, rough) | |
| scholar | |
| skilful | |
| skillful(adjective, awkward, incompetent) | |
| spirited | |
| strong | |
| subtle | |
| thoughtful(adjective, sharp, happy, careless, intelligent) | |
| vigorous |
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| APA | Smart Define. (2016). stupid thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/stupid/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "stupid thesaurus" https://smartdefine.org/stupid/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, stupid thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stupid/thesaurus/antonyms>. |
| MLA | Smart Define. "stupid thesaurus" 2 April 2016. Web. 26 September 2026. <https://smartdefine.org/stupid/thesaurus/antonyms> |