confrontational vs confrontation

confrontational is not a noun while confrontation is a noun.

Word	Noun	Adjective	Verb	Adverb
confrontational	No	Yes	No	No
confrontation	Yes	No	No	No

confrontational (noun)	confrontation (noun)
	the act of hostile groups opposing each other
	a focussed comparison; bringing together for a careful comparison
	a hostile disagreement face-to-face
	a bold challenge
	discord resulting from a clash of ideas or opinions

confrontational (adjective)	confrontation (adjective)
of or relating to confrontation