boxers vs plural

boxers and plural both are nouns.

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

boxers (noun)	plural (noun)
underpants worn by men	the form of a word that is used to denote more than one

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