mutational vs mutation

mutational is not a noun while mutation is a noun.

Word	Noun	Adjective	Verb	Adverb
mutational	No	Yes	No	No
mutation	Yes	No	No	No

mutational (noun)	mutation (noun)
	(genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism
	a change or alteration in form or qualities
	(biology) an organism that has characteristics resulting from chromosomal alteration

mutational (adjective)	mutation (adjective)
of or relating to or resulting from mutation