wart vs keratosis

wart and keratosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
wart	Yes	No	No	No
keratosis	Yes	No	No	No

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

wart: (pathology) a firm abnormal elevated blemish on the skin; caused by a virus
keratosis: a skin condition marked by an overgrowth of layers of horny skin

Other hypernyms of wart include blemish, defect, mar.

wart (noun)	keratosis (noun)
(pathology) a firm abnormal elevated blemish on the skin; caused by a virus	a skin condition marked by an overgrowth of layers of horny skin
any small rounded protuberance (as on certain plants or animals)
an imperfection in someone or something that is suggestive of a wart (especially in smallness or unattractiveness)