Synonyms|1.6kAntonyms|506|Broader|18Narrower|14Related|1.7k
2
airheaded
2
antic
2
capricious
2
casual(adjective, deliberate, manner, nonchalant)
2
comic
2
compensate
2
cute
2
easy
2
empty-headed
2
featherbrained
2
flighty
2
flyaway
2
good
2
harebrained
2
harmless
2
head-in-the-clouds
2
hilarious(adjective, funny)
2
idle
2
jesting
2
joking
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APASmart Define. (2016). serious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/serious/thesaurus/antonyms
ChicagoSmart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, serious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/serious/thesaurus/antonyms>.
MLASmart Define. "serious thesaurus" 24 February 2016. Web. 25 September 2026. <https://smartdefine.org/serious/thesaurus/antonyms>