plural vs stretch pants

plural and stretch pants both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
stretch pants	Yes	No	No	No

plural (noun)	stretch pants (noun)
the form of a word that is used to denote more than one	trousers made of a stretchy fabric

plural (adjective)	stretch pants (adjective)
grammatical number category referring to two or more items or units
composed of more than one member, set, or kind