Synonyms|319Antonyms|153|Broader|10Narrower|18Related|329
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reposefulness(noun, inertness)
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resignation
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retardation(noun, slowness)
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shallowness(weakness, apathy, nonsense, absurdity, ignorance)
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silliness(apathy, nonsense, absurdity)
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simplicity(apathy, nonsense, absurdity)
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sleep(noun, disregard, dullness, apathy, inactivity)
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slow
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slumber(noun, disregard, dullness, apathy, inactivity)
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softness
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spinelessness
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stoicism
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tenacity
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thick-headedness(weakness, apathy, nonsense, absurdity, ignorance)
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thick-wittedness(noun, dullness)
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time-wasting(noun, inactivity, lethargy, trifling, laziness)
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time to burn(expression, idiom, inactivity, lethargy, trifling)
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time to kill(expression, idiom, inactivity, lethargy, trifling)
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torpescence(noun, apathy, inactivity, lethargy, negligence)
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trifling(noun, inactivity, lethargy, laziness, idleness)
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APASmart Define. (2015). sluggishness thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sluggishness/thesaurus/synonyms
ChicagoSmart Define. 2015. "sluggishness thesaurus" https://smartdefine.org/sluggishness/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, sluggishness thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sluggishness/thesaurus/synonyms>.
MLASmart Define. "sluggishness thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/sluggishness/thesaurus/synonyms>