drusen vs eye disease

drusen and eye disease both are nouns.

Word	Noun	Adjective	Verb	Adverb
drusen	Yes	No	No	No
eye disease	Yes	No	No	No

As nouns, eye disease is a hypernym of drusen; that is, eye disease is a word with a broader meaning than drusen:

drusen: (plural) an eye disease resulting from small accumulations of hyaline bodies underneath the retina
eye disease: any disease of the eye

drusen (noun)	eye disease (noun)
(plural) an eye disease resulting from small accumulations of hyaline bodies underneath the retina	any disease of the eye