170 entries under sluggish topic. ×

4
sickly(adjective, light, soft, flat, weakness)
4
stiff(adjective, moderate, severe, low, slow)
4
sullen(adjective, upset, slow, unhappy, dark)
3
addled(adjective, flat, gloomy, dirty)
3
daft(adjective, foolish, stupid, crazy)
3
dilatory(adjective, low, careless, indifferent, idle)
3
languishing(adjective, weak, flat, weakness, low)
3
limp(adjective, weak, flat, low, sad)
3
numskulled(adjective, slow, stupid, unintelligent)
3
off(adjective, increase, moderate, low, slow)
3
quiescent(adjective, cold, still, lifeless)
3
tardy(adjective, low, careless, indifferent, idle)
2
daffy(adjective, foolish, stupid, crazy)
2
debilitated(adjective, heavy, weary, apathetic, tired)
2
dragging(adjective, slow, heavy, boring, tedious)
2
half-baked(adjective, simple, slow, foolish, stupid)
2
immobile(adjective, still, idle, lifeless)
2
infirm(adjective, weakness, relaxed, loose, feeble)
2
jobless(idle, lazy, motionless, unmoving)
2
laggard(adjective, careless, indifferent, idle, weary)
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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>