87 entries under lethargic topic. ×

9
supine(adjective, dull, quiet, easy, slow)
8
bored(adjective, dull, beat, weary, tired)
8
heavy(adjective, dull, quiet, easy, slow)
8
languid(adjective, dull, slow, careless, relaxed)
8
languorous(adjective, dull, slow, careless, relaxed)
8
lazy(adjective, dull, slow, relaxed, deliberate)
7
enervated(adjective, beat, slow, relaxed, still)
7
idle(adjective, dull, quiet, flat, careless)
7
nodding(adjective, quiet, slow, heavy, tired)
6
dreamy(adjective, quiet, easy, slow, relaxed)
6
passive(adjective, dull, quiet, careless, heavy)
6
phlegmatic(adjective, quiet, easy, slow, relaxed)
5
inanimate(adjective, still, lifeless, languid)
5
indolent(adjective, dull, quiet, easy, careless)
5
lackadaisical(adjective, dull, quiet, easy, slow)
4
drugged(adjective, cold, dead, tired, senseless)
4
limp(adjective, dull, slow, relaxed, still)
4
out of it(expression, adjective, idiom, dull, quiet)
4
slothful(adjective, dull, quiet, careless, heavy)
4
snoozy(adjective, dull, quiet, slow, careless)
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APASmart Define. (2016). sleepy thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/sleepy/thesaurus/synonyms
ChicagoSmart Define. 2016. "sleepy thesaurus" https://smartdefine.org/sleepy/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, sleepy thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/sleepy/thesaurus/synonyms>.
MLASmart Define. "sleepy thesaurus" 18 February 2016. Web. 29 September 2026. <https://smartdefine.org/sleepy/thesaurus/synonyms>