ulcerative vs ulceration

ulcerative is not a noun while ulceration is a noun.

Word	Noun	Adjective	Verb	Adverb
ulcerative	No	Yes	No	No
ulceration	Yes	No	No	No

ulcerative (noun)	ulceration (noun)
	the process of ulcer formation; the process of becoming ulcerated
	a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue

ulcerative (adjective)	ulceration (adjective)
of or relating to or characterized by ulceration