confrontation vs confrontational

confrontation is a noun but confrontational is not a noun.

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

confrontation (noun)	confrontational (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

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