Synonyms|46Antonyms|0|Broader|0Narrower|0Related|1
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lethargic(adjective, dull, slow, heavy, sluggish)
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lifeless(adjective, dull, slow, heavy, sluggish)
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listless(adjective, dull, slow, heavy, sluggish)
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lumpish(adjective, dull, slow, heavy, sluggish)
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mooney(adjective, dull, slow, heavy, sluggish)
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off(adjective, dull, slow, heavy, sluggish)
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phlegmatic(adjective, dull, slow, heavy, sluggish)
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pokey(adjective, dull, slow, heavy, sluggish)
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slack(adjective, dull, slow, heavy, sluggish)
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slothful(adjective, dull, slow, heavy, sluggish)
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sluggard(adjective, dull, slow, heavy, sluggish)
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sluggish(adjective, dull, slow, inactive, listless)
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slumberous(adjective, dull, slow, heavy, sluggish)
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stagnant(adjective, dull, slow, heavy, sluggish)
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stiff(adjective, dull, slow, heavy, sluggish)
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sullen(adjective, dull, slow, heavy, sluggish)
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torpid(adjective, dull, slow, heavy, sluggish)
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unresponsive(adjective, dull, slow, heavy, sluggish)
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asleep
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foot-dragging(adjective, slow, sluggish, logy, slow-moving)
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APASmart Define. (2013). sleepyheaded thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sleepyheaded/thesaurus/synonyms
ChicagoSmart Define. 2013. "sleepyheaded thesaurus" https://smartdefine.org/sleepyheaded/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2013, sleepyheaded thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sleepyheaded/thesaurus/synonyms>.
MLASmart Define. "sleepyheaded thesaurus" 17 June 2013. Web. 24 September 2026. <https://smartdefine.org/sleepyheaded/thesaurus/synonyms>