fishnet stockings vs plural

fishnet stockings and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
fishnet stockings	Yes	No	No	No
plural	Yes	Yes	No	No

fishnet stockings (noun)	plural (noun)
leg coverings for women, made from an open mesh fabric resembling netting.	the form of a word that is used to denote more than one

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