6
dormant(adjective, dull, idle, weary, apathetic)
6
lazy(adjective, dull, relaxed, idle, weary)
6
opiate(noun, adjective, dull, quiet, heavy)
6
somniferous(adjective, dull, quiet, dark, heavy)
6
tired(adjective, dull, beat, careless, indifferent)
6
weary(adjective, dull, beat, careless, relaxed)
5
dreamy(adjective, inactivity)
5
heavy(adjective, quiet, slow, relaxed, weary)
5
languid(adjective, dull, careless, relaxed, indifferent)
5
napping(adjective, tired, inactivity, lethargic, unconscious)
5
passive(adjective, dull, careless, indifferent, idle)
4
dead(adjective, beat, cold, tired, senseless)
4
indolent(adjective, dull, careless, relaxed, indifferent)
4
lackadaisical(adjective, dull, careless, relaxed, indifferent)
4
lifeless(adjective, dull, careless, indifferent, idle)
4
oscitant
4
out of it(expression, adjective, idiom, dull, quiet)
4
sedative(adjective, dull, quiet, dark, heavy)
4
sleeping(adjective, quiet, slow, heavy, tired)
4
slumbrous
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APASmart Define. (2015). somnolent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/somnolent/thesaurus/synonyms
ChicagoSmart Define. 2015. "somnolent thesaurus" https://smartdefine.org/somnolent/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, somnolent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/somnolent/thesaurus/synonyms>.
MLASmart Define. "somnolent thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/somnolent/thesaurus/synonyms>