7
soporific(adjective, quiet, dark, heavy, awareness)
6
somniferous(adjective, quiet, slow, dark, heavy)
5
narcotic(adjective, quiet, slow, dark, heavy)
4
hypnogogic
4
sedative(adjective, quiet, slow, dark, heavy)
4
somnifacient(adjective, quiet, dark, heavy, awareness)
4
soporiferous
3
hypnagogic
3
hypnotic(adjective, quiet, dark, heavy, awareness)
3
opiate(adjective, quiet, slow, dark, heavy)
2
somnolent(adjective, quiet, dark, heavy, awareness)
1
blah(adjective, informal, sleepy)
1
comatose(adjective, sleepy)
1
depressant
1
draggy(adjective, quiet, slow, heavy, sleepy)
1
heavy(adjective, informal, sleepy)
1
inactive(adjective, sleepy)
1
lethargic(adjective, sleepy)
1
listless(adjective, sleepy)
1
narcotizing
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APASmart Define. (2013). somnific thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/somnific/thesaurus/synonyms
ChicagoSmart Define. 2013. "somnific thesaurus" https://smartdefine.org/somnific/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, somnific thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/somnific/thesaurus/synonyms>.
MLASmart Define. "somnific thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/somnific/thesaurus/synonyms>