pair of scissors vs plural

pair of scissors and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
pair of scissors	Yes	No	No	No
plural	Yes	Yes	No	No

pair of scissors (noun)	plural (noun)
an edge tool having two crossed pivoting blades	the form of a word that is used to denote more than one

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