keratosis vs skin disorder

keratosis and skin disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
keratosis	Yes	No	No	No
skin disorder	Yes	No	No	No

As nouns, skin disorder is a hypernym of keratosis; that is, skin disorder is a word with a broader meaning than keratosis:

Other hypernyms of keratosis include disease of the skin, skin disease.

keratosis (noun)	skin disorder (noun)
a skin condition marked by an overgrowth of layers of horny skin	a disease affecting the skin