Synonyms|1.6kAntonyms|506|Broader|18Narrower|14Related|1.7k
1
superficial(sensible, deep)
1
trifling
1
ultrasafe
1
undemanding
1
unthreatening
1
uproarious
1
very funny(expression, sad)
1
warm-hearted(mean, nasty, rude)
1
weak-minded
1
whimsical
1
witless
1
witty(adjective, funny, clever)
0
mickey mouse
0
adrift
0
adroit
0
adventuresome
0
adventurous
0
agile
0
agitate
0
agreeable
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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>