170 entries under sluggish topic. ×

6
dormant(adjective, still, idle, weary, apathetic)
6
ignorant(adjective, rough, low, slow, offensive)
6
impassive(adjective, calm, tough, slow, relaxed)
6
shallow(adjective, silly, stupid, green)
6
unconcerned(adjective, calm, flat, low, sad)
6
witless(adjective, simple, careless, silly, foolish)
5
asleep(adjective, quiet, still, tired)
5
drowsy(noun, adjective, careless, relaxed, indifferent)
5
idle(adjective, careless, cold, indifferent, still)
5
plodding(adjective, obscure, slow, heavy, ordinary)
5
uninterested(adjective, relaxed, indifferent, boring, apathetic)
4
abeyant(lazy, motionless, unmoving, stationary)
4
besotted(adjective, unintelligent, obtuse, plodding)
4
draggy(adjective, quiet, weak, flat, low)
4
enervated(adjective, weak, flat, low, sad)
4
hebetudinous(adjective, simple, slow, heavy, apathetic)
4
logy(adjective, slow, slow-moving, snail-paced)
4
lukewarm(adjective, flat, warm, cold)
4
scatterbrained(adjective, silly, foolish, stupid)
4
sedentary(idle, lazy, motionless, unmoving)
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APASmart Define. (2016). dull thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/dull/thesaurus/synonyms
ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/dull/thesaurus/synonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/dull/thesaurus/synonyms>