Synonyms|1.6kAntonyms|506|Broader|18Narrower|14Related|1.7k
1
frisky
1
frothy
1
gay
1
good-humored(mean, gloomy)
1
half-witted
1
inconsequential
1
innocent
1
innocuous
1
insane
1
jerky
1
joyful(adjective, upset, sad)
1
joyous
1
kooky
1
lite
1
lowbrow
1
ludic
1
lunatic
1
mad
1
mawkish(adjective, emotional, sentimental)
1
mild
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APASmart Define. (2016). serious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/serious/thesaurus/antonyms
ChicagoSmart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, serious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/serious/thesaurus/antonyms>.
MLASmart Define. "serious thesaurus" 24 February 2016. Web. 26 September 2026. <https://smartdefine.org/serious/thesaurus/antonyms>