4
drowsy
4
lethargic(adjective, dull, quiet, slow, heavy)
4
nodding(adjective, sleepy)
4
off-guard(adjective, adverb, unprepared)
4
paralysed
4
passive(adjective, calm, dull, sluggish, lifeless)
4
reposing(adjective, calm, quiet, lifeless, late)
4
resting(adjective, calm, dead, unconscious, sleeping)
4
senseless(adjective, hard, tough, severe, cold)
4
slumberous
4
sound asleep(expression, adjective, idiom, inactivity, sleeping)
4
still(adjective, calm, dull, gentle, sluggish)
3
breathless
3
cold(adjective, hard, tough, severe, cruel)
3
latent(adjective, calm, dull, quiet, gentle)
3
motionless(adjective, calm, dull, quiet, gentle)
3
out cold(expression, adjective, calm, dead, unresponsive)
3
out of it(expression, adjective, idiom, calm, quiet)
3
sluggish(adjective, dull, quiet, heavy, lazy)
3
spiritless
10 years ago|12k views|share |citing 
APASmart Define. (2016). asleep thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/asleep/thesaurus/synonyms
ChicagoSmart Define. 2016. "asleep thesaurus" https://smartdefine.org/asleep/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, asleep thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/asleep/thesaurus/synonyms>.
MLASmart Define. "asleep thesaurus" 8 February 2016. Web. 22 September 2026. <https://smartdefine.org/asleep/thesaurus/synonyms>