bikini pants vs plural

bikini pants and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
bikini pants	Yes	No	No	No
plural	Yes	Yes	No	No

bikini pants (noun)	plural (noun)
(used in the plural) small and tight-fitting underpants; worn by women	the form of a word that is used to denote more than one

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