attrition vs attritional

attrition is a noun but attritional is not a noun.

Word	Noun	Adjective	Verb	Adverb
attrition	Yes	No	No	No
attritional	No	Yes	No	No

attrition (noun)	attritional (noun)
the act of rubbing together; wearing something down by friction
a wearing down to weaken or destroy
sorrow for sin arising from fear of damnation
the wearing down of rock particles by friction due to water or wind or ice
erosion by friction

attrition (adjective)	attritional (adjective)
	relating to or caused by attrition