128 entries under dull topic. ×

3
obtuse(adjective, heavy, stupid, impassive)
3
remiss(adjective, idle, sluggish, inactivity)
3
shiftless(adjective, idle, sluggish, lazy)
3
slumberous(adjective, moving, slow, heavy)
3
tardy(idle, sluggish, lazy, inactive)
2
blah(adjective, quiet, weak, easy)
2
debilitated(adjective, weak, heavy, weary)
2
dopey(adjective, weak, easy, slow)
2
dragging(adjective, slow, heavy, sluggish)
2
dumb(adjective, heavy, stupid, impassive)
2
easy(adjective, quiet, weak, slow)
2
enervated(adjective, weak, easy, slow)
2
even(adjective, quiet, flat, slow)
2
halfhearted(adjective, careless, cold, indifferent)
2
insensitive(adjective, quiet, flat, heavy)
2
laid-back(adjective, quiet, weak, easy)
2
limp(adjective, weak, easy, slow)
2
lukewarm(adjective, flat, cold, sluggish)
2
moony(adjective, quiet, weak, easy)
2
off(adjective, slow, heavy, sluggish)
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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>