narcotic

noun

soporific drug, opiate, sleeping pill, soporific;

painkiller, pain reliever, analgesic, anodyne, palliative, anesthetic;

tranquilizer, sedative;

informal downer;

dated sleeping draft;

literary nepenthes;

rare stupefacient, stupefactive.

adjective

soporific, sleep-inducing, opiate, hypnotic;

painkilling, pain-relieving, analgesic, anodyne, anesthetic, stupefying, numbing, dulling, tranquilizing, sedative, calming;

rare stupefacient, stuporific, stupefactive.