dermatosis vs skin disorder

dermatosis and skin disorder both are nouns.

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

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

dermatosis: disorder involving lesions or eruptions of the skin (in which there is usually no inflammation)
skin disorder: a disease affecting the skin

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

dermatosis (noun)	skin disorder (noun)
disorder involving lesions or eruptions of the skin (in which there is usually no inflammation)	a disease affecting the skin