sunglasses vs plural

sunglasses and plural both are nouns.

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

sunglasses (noun)	plural (noun)
(plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun	the form of a word that is used to denote more than one

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