migration vs migrational

migration is a noun but migrational is not a noun.

Word	Noun	Adjective	Verb	Adverb
migration	Yes	No	No	No
migrational	No	Yes	No	No

migration (noun)	migrational (noun)
the movement of persons from one country or locality to another
the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding
(chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule
a group of people migrating together (especially in some given time period)

migration (adjective)	migrational (adjective)
	of or related to migration