nontricyclic antidepressant vs nontricyclic antidepressant drug

nontricyclic antidepressant and nontricyclic antidepressant drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
nontricyclic antidepressant	Yes	No	No	No
nontricyclic antidepressant drug	Yes	No	No	No

As nouns, nontricyclic antidepressant and nontricyclic antidepressant drug are synonyms defined as:

nontricyclic antidepressant and nontricyclic antidepressant drug: a class of antidepressant drugs that are not tricyclic drugs and do not act by inhibiting MAO

Other synonyms of nontricyclic antidepressant include nontricyclic, nontricyclic drug.

nontricyclic antidepressant (noun)	nontricyclic antidepressant drug (noun)
a class of antidepressant drugs that are not tricyclic drugs and do not act by inhibiting MAO	a class of antidepressant drugs that are not tricyclic drugs and do not act by inhibiting MAO