arbitration vs arbitrational

arbitration is a noun but arbitrational is not a noun.

Word	Noun	Adjective	Verb	Adverb
arbitration	Yes	No	No	No
arbitrational	No	Yes	No	No

arbitration (noun)	arbitrational (noun)
the act of deciding as an arbiter; giving authoritative judgment
(law) the hearing and determination of a dispute by an impartial referee agreed to by both parties (often used to settle disputes between labor and management)

arbitration (adjective)	arbitrational (adjective)
	relating to or resulting from arbitration