bathing trunks vs plural

bathing trunks and plural both are nouns.

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

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

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