Synonyms|190Antonyms|44|Broader|1Narrower|5Related|93
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validity
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vigor
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weightiness
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weighting
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APASmart Define. (2015). frivolousness thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/frivolousness/thesaurus/antonyms
ChicagoSmart Define. 2015. "frivolousness thesaurus" https://smartdefine.org/frivolousness/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, frivolousness thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/frivolousness/thesaurus/antonyms>.
MLASmart Define. "frivolousness thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/frivolousness/thesaurus/antonyms>