14
lifeless(adjective, calm, dull, flat, slow)
14
somnolent(adjective, dull, quiet, slow, careless)
13
passive(adjective, calm, dull, flat, careless)
13
tired(adjective, dull, slow, careless, indifferent)
12
weary(adjective, dull, weak, easy, slow)
11
comatose(adjective, dull, quiet, weak, easy)
11
enervated(adjective, dull, weak, easy, slow)
11
supine(adjective, dull, quiet, weak, easy)
10
dilatory(adjective, dull, quiet, easy, careless)
10
heavy(adjective, dull, quiet, weak, easy)
10
slack(adjective, dull, quiet, slow, careless)
9
dopey(adjective, action, dull, quiet, weak)
9
unconcerned(adjective, calm, dull, weak, easy)
8
dozy(adjective, quiet, slow, heavy, tired)
8
dreamy(adjective, dull, quiet, easy, slow)
8
exhausted(adjective, weary, tired, sluggish, lifeless)
8
impassive(adjective, calm, dull, weak, easy)
8
inanimate(adjective, cold, senseless, languid, inert)
8
leaden(adjective, dull, quiet, weak, easy)
8
spiritless(adjective, dull, weak, easy, slow)
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APASmart Define. (2016). lethargic thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/lethargic/thesaurus/synonyms
ChicagoSmart Define. 2016. "lethargic thesaurus" https://smartdefine.org/lethargic/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, lethargic thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/lethargic/thesaurus/synonyms>.
MLASmart Define. "lethargic thesaurus" 4 January 2016. Web. 23 September 2026. <https://smartdefine.org/lethargic/thesaurus/synonyms>