Synonyms|1.6kAntonyms|506|Broader|18Narrower|14Related|1.7k
1
mischievous
1
mocking
1
negligible
1
nominal
1
nonchalant
1
noncrucial
1
nonhazardous
1
nonthreatening
1
nutty
1
over smart
1
paltry
1
petty
1
piddling
1
pretty
1
priceless(adjective, funny, cheap)
1
rich(adjective, funny, lacking, wanting)
1
screwball
1
senseless
1
small
1
sprightly
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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>