adrenergic drug vs adrenergic

adrenergic drug and adrenergic both are nouns.

Word	Noun	Adjective	Verb	Adverb
adrenergic drug	Yes	No	No	No
adrenergic	Yes	Yes	No	No

As nouns, adrenergic drug and adrenergic are synonyms defined as:

adrenergic drug and adrenergic: drug that has the effects of epinephrine

adrenergic drug (noun)	adrenergic (noun)
drug that has the effects of epinephrine	drug that has the effects of epinephrine

adrenergic drug (adjective)	adrenergic (adjective)
	relating to epinephrine (its release or action)