89 entries under lethargic topic. ×

11
phlegmatic(adjective, dull, quiet, weak, moving)
11
sleepy(adjective, dull, quiet, moving, slow)
10
lackadaisical(adjective, dull, quiet, weak, easy)
9
unresponsive(adjective, dull, quiet, moving, flat)
8
leaden(adjective, dull, quiet, weak, moving)
8
impassive(adjective, dull, weak, moving, easy)
7
heavy(adjective, upset, dull, quiet, weak)
6
somnolent(adjective, dull, careless, relaxed, indifferent)
6
spiritless(adjective, dull, quiet, weak, easy)
5
comatose(adjective, dull, weak, easy, slow)
5
lumpish(adjective, dull, slow, heavy, stupid)
5
resting(adjective, slow, sluggish, easygoing, lazy)
4
dilatory(adjective, dull, quiet, easy, careless)
4
drowsy(adjective, dull, quiet, easy, careless)
4
hebetudinous(adjective, dull, slow, heavy, apathetic)
3
down(adjective, dull, moving, slow, heavy)
3
laggard(adjective, dull, quiet, easy, careless)
3
slumberous(adjective, dull, moving, slow, heavy)
2
blah(adjective, dull, quiet, weak, easy)
2
bored(languid, indolent)
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APASmart Define. (2015). inert thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/inert/thesaurus/synonyms
ChicagoSmart Define. 2015. "inert thesaurus" https://smartdefine.org/inert/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, inert thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/inert/thesaurus/synonyms>.
MLASmart Define. "inert thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/inert/thesaurus/synonyms>