pj's vs plural

pj's and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
pj's	Yes	No	No	No
plural	Yes	Yes	No	No

pj's (noun)	plural (noun)
(usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers	the form of a word that is used to denote more than one

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