plural vs skivvies

plural and skivvies both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
skivvies	Yes	No	No	No

plural (noun)	skivvies (noun)
the form of a word that is used to denote more than one	(used in the plural) men's underwear consisting of cotton undershirt and underpants

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