nightclothes vs plural

nightclothes and plural both are nouns.

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

nightclothes (noun)	plural (noun)
garments designed to be worn in bed	the form of a word that is used to denote more than one

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