87 entries under heavy topic. ×

8
impassive(adjective, dull, weak, moving, easy)
6
spiritless(adjective, dull, quiet, weak, easy)
5
comatose(adjective, dull, weak, easy, slow)
5
lumpish(adjective, dull, slow, stupid)
4
dilatory(adjective, dull, quiet, easy, careless)
4
drowsy(adjective, dull, quiet, easy, careless)
4
hebetudinous(adjective, dull, slow, apathetic)
3
blunt(adjective, dull, stupid, impassive)
3
down(adjective, dull, moving, slow)
3
laggard(adjective, dull, quiet, easy, careless)
3
obtuse(adjective, dull, stupid, impassive)
3
slumberous(adjective, dull, moving, slow)
2
blah(adjective, dull, quiet, weak, easy)
2
debilitated(adjective, dull, weak, weary)
2
dopey(adjective, dull, weak, easy, slow)
2
dragging(adjective, dull, slow, sluggish)
2
dumb(adjective, dull, stupid, impassive)
2
easy(adjective, dull, quiet, weak, slow)
2
enervated(adjective, dull, weak, easy, slow)
2
even(adjective, dull, quiet, flat, slow)
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APASmart Define. (2015). inert thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/inert/thesaurus/synonyms
ChicagoSmart Define. 2015. "inert thesaurus" https://smartdefine.org/inert/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, inert thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/inert/thesaurus/synonyms>.
MLASmart Define. "inert thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/inert/thesaurus/synonyms>