1) Depressant 2) Hypnagogic 3) Sleep inducing 4) Somniferous 5) Somnific 6) Soporiferous 7) Soporific 1) Depressant 2) Hypnagogic 3) Somniferous 4) Somnific 5) Soporiferous 6) Soporific 
hypnagogic, hypnogogic 1. Sleep-producing; hypnotic. 2. Preceding sleep: a reference to images or dreams that are perceived during the transition between the waking state and sleep.