Synonyms|274Antonyms|54|Broader|2Narrower|1Related|153
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levity
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lightheartedness
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merriment
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mirth
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optimism
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perkiness
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pleasantness
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silliness
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sociability
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sociality
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sugariness
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syrupiness
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verve
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whole-spiritedness(noun, person, feelings, emotions)
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APASmart Define. (2016). sullenness thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sullenness/thesaurus/antonyms
ChicagoSmart Define. 2016. "sullenness thesaurus" https://smartdefine.org/sullenness/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2016, sullenness thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sullenness/thesaurus/antonyms>.
MLASmart Define. "sullenness thesaurus" 23 March 2016. Web. 27 September 2026. <https://smartdefine.org/sullenness/thesaurus/antonyms>