accommodation vs accommodational

accommodation is a noun but accommodational is not a noun.

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

accommodation (noun)	accommodational (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

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