Synonyms|141Antonyms|43|Broader|1Narrower|2Related|62
4
ennui(noun, fatigue, weariness)
4
faintness(noun, weariness)
4
idleness(noun, disregard, dullness, apathy, inactivity)
4
indifference(noun, disregard, dullness, apathy, inactivity)
4
indolence(noun, disregard, dullness, apathy, inactivity)
4
languor(noun, disregard, dullness, apathy, inactivity)
4
passivity(noun, dullness, apathy, lethargy, negligence)
4
sloth(noun, disregard, dullness, apathy, inactivity)
4
slothfulness(noun, apathy, lethargy, negligence, languor)
4
stupefaction(noun, dullness)
4
torpidity(noun, disregard, dullness, apathy, inactivity)
3
dormancy(noun, apathy, inactivity, lethargy, negligence)
3
dreaminess(noun, dullness, apathy, lethargy, negligence)
3
feebleness(noun, weariness)
3
heaviness(noun, dullness, apathy, lethargy, negligence)
3
lackadaisicalness(noun, dullness, apathy, lethargy, negligence)
3
languidness(noun, disregard, dullness, apathy, indifference)
3
languorousness(noun, dullness, apathy, lethargy, negligence)
3
lassitude(noun, disregard, dullness, apathy, inactivity)
3
phlegm(noun, disregard, dullness, apathy, inactivity)
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APASmart Define. (2015). sleepiness thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sleepiness/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleepiness thesaurus" https://smartdefine.org/sleepiness/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, sleepiness thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sleepiness/thesaurus/synonyms>.
MLASmart Define. "sleepiness thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/sleepiness/thesaurus/synonyms>