verruca vs keratosis

verruca and keratosis both are nouns.

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

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

verruca: (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 verruca include blemish, defect, mar.

verruca (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