| slight(adjective, strong) | |
| droll(adjective, amusing, farcical) | |
| foolish(adjective, sound, wise, nonsensical, idiotic) | |
| insignificant | |
| unorganized | |
| comical(adjective, amusing) | |
| dizzy | |
| facetious(adjective, kidding) | |
| farcical(adjective, absurd) | |
| flip | |
| frolicsome(adjective, playful) | |
| happy(adjective, upset, false, miserable, dishonest) | |
| hysterical | |
| kittenish | |
| laughable | |
| puerile | |
| ridiculous(adjective, stupid, funny) | |
| risible(adjective, humorous) | |
| sappy(adjective, foolish, sentimental) | |
| zany(adjective, crazy, funny) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/serious/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/serious/thesaurus/antonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 24 September 2026. <https://smartdefine.org/serious/thesaurus/antonyms> |