mutation vs mutational

mutation is a noun but mutational is not a noun.

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

mutation (noun)	mutational (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

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