seborrhea vs skin disorder

seborrhea and skin disorder both are nouns.

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

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

seborrhea: a condition in which overactivity of the sebaceous glands causes the skin to become oily
skin disorder: a disease affecting the skin

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

seborrhea (noun)	skin disorder (noun)
a condition in which overactivity of the sebaceous glands causes the skin to become oily	a disease affecting the skin