See opiate in Webster's New World Roget's A-Z Thesaurus II
noun
A substance that affects the central nervous system and is often addictive:
drug, hallucinogen, narcotic. (Informal) dope. See drugsSomething that induces sleep or sedation:
hypnotic, narcotic, sedative, somnifacient, soporific. See awareness
adjective
Inducing sleep or sedation:
hypnotic, narcotic, sedative, sleepy, slumberous, somnifacient, somniferous, somnific, somnolent, soporific. See awareness
verb
To administer or add a drug to:
dose, drug, medicate, narcotize, physic. (Informal) dope (up). See drugs
Learn more about opiate