keratoacanthoma vs acanthoma

keratoacanthoma and acanthoma both are nouns.

Word	Noun	Adjective	Verb	Adverb
keratoacanthoma	Yes	No	No	No
acanthoma	Yes	No	No	No

As nouns, acanthoma is a hypernym of keratoacanthoma; that is, acanthoma is a word with a broader meaning than keratoacanthoma:

keratoacanthoma: skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread; it usually disappears spontaneously, often leaving a scar
acanthoma: a neoplasm originating in the epidermis

Other hypernyms of keratoacanthoma include skin tumor.

keratoacanthoma (noun)	acanthoma (noun)
skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread; it usually disappears spontaneously, often leaving a scar	a neoplasm originating in the epidermis