drusen vs plural

drusen and plural both are nouns.

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

drusen (noun)	plural (noun)
(plural) an eye disease resulting from small accumulations of hyaline bodies underneath the retina	the form of a word that is used to denote more than one

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