depressant vs sedative

depressant and sedative both are nouns.

Word	Noun	Adjective	Verb	Adverb
depressant	Yes	Yes	No	No
sedative	Yes	Yes	No	No

As nouns, depressant and sedative are synonyms defined as:

depressant and sedative: a drug that reduces excitability and calms a person

Other synonyms of depressant include downer, sedative drug.

depressant (noun)	sedative (noun)
a drug that reduces excitability and calms a person	a drug that reduces excitability and calms a person

depressant (adjective)	sedative (adjective)
capable of depressing physiological or psychological activity or response by a chemical agent	tending to soothe or tranquilize