See soporific in Webster's New World Roget's A-Z Thesaurus II
adjective
Inducing sleep or sedation:
hypnotic, narcotic, opiate, sedative, sleepy, slumberous, somnifacient, somniferous, somnific, somnolent. See awarenessReady for or needing sleep:
dozy, drowsy, nodding, sleepy, slumberous, slumbery, somnolent. See awareness
noun
Something that induces sleep or sedation:
hypnotic, narcotic, opiate, sedative, somnifacient. See awareness
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