swimming trunks vs plural

swimming trunks and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
swimming trunks	Yes	No	No	No
plural	Yes	Yes	No	No

swimming trunks (noun)	plural (noun)
swimsuit worn by men while swimming	the form of a word that is used to denote more than one

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