accommodational vs accommodation

accommodational is not a noun while accommodation is a noun.

Word	Noun	Adjective	Verb	Adverb
accommodational	No	Yes	No	No
accommodation	Yes	No	No	No

accommodational (noun)	accommodation (noun)
	the act of providing something (lodging or seat or food) to meet a need
	(physiology) the automatic adjustment in focal length of the natural lens of the eye
	living quarters provided for public convenience
	in the theories of Jean Piaget: the modification of internal representations in order to accommodate a changing knowledge of reality
	a settlement of differences
	making or becoming suitable; adjusting to circumstances

accommodational (adjective)	accommodation (adjective)
of or relating to the accommodation of the lens of the eye