impetigo vs disease of the skin

impetigo and disease of the skin both are nouns.

Word	Noun	Adjective	Verb	Adverb
impetigo	Yes	No	No	No
disease of the skin	Yes	No	No	No

As nouns, disease of the skin is a hypernym of impetigo; that is, disease of the skin is a word with a broader meaning than impetigo:

impetigo: a very contagious infection of the skin; common in children; localized redness develops into small blisters that gradually crust and erode
disease of the skin: a disease affecting the skin

Other hypernyms of impetigo include skin disease, skin disorder.

impetigo (noun)	disease of the skin (noun)
a very contagious infection of the skin; common in children; localized redness develops into small blisters that gradually crust and erode	a disease affecting the skin