Synonyms|443Antonyms|260|Broader|12Narrower|18Related|368
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fickleness
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flexibleness
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fool mistake(expression, judgment)
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fooling
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freak
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fribble
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frolic
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frothiness
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funster
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gaucherie
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gayness
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gleefulness
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good cheer(expression, sorrow, sadness)
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high-pitched shout
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high-spiritedness
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high camp(expression, sadness)
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hopefulness(sorrow, sadness)
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hot foot
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humbug
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hurray
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APASmart Define. (2015). seriousness thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/seriousness/thesaurus/antonyms
ChicagoSmart Define. 2015. "seriousness thesaurus" https://smartdefine.org/seriousness/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, seriousness thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/seriousness/thesaurus/antonyms>.
MLASmart Define. "seriousness thesaurus" 23 December 2015. Web. 27 September 2026. <https://smartdefine.org/seriousness/thesaurus/antonyms>