plural vs bathing trunks

plural and bathing trunks both are nouns.

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

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

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