adrenergic vs sympathomimetic

adrenergic is a noun but sympathomimetic is not a noun.

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

As adjectives, adrenergic and sympathomimetic are synonyms defined as:

adrenergic and sympathomimetic: relating to epinephrine (its release or action)

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

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