maleate vs antidepressant drug

maleate and antidepressant drug both are nouns.

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

As nouns, antidepressant drug is a hypernym of maleate; that is, antidepressant drug is a word with a broader meaning than maleate:

maleate: a salt or ester of maleic acid; used as a nontricyclic antidepressant drug for psychomotor activation
antidepressant drug: any of a class of drugs used to treat depression; often have undesirable side effects

Other hypernyms of maleate include antidepressant, ester.

maleate (noun)	antidepressant drug (noun)
a salt or ester of maleic acid; used as a nontricyclic antidepressant drug for psychomotor activation	any of a class of drugs used to treat depression; often have undesirable side effects