Synonyms of barbiturate

1 Syllable
dope, drug
2 Syllables
calmant, downer
3 Syllables
opiate, narcotic, pain-killer, pacifier, quietive, depressant, hypnotic
4 Syllables
medication, tranquillizer, calmative, anodyne, analgesic
6 Syllables
benzodiazepine