fractional vs fraction

fractional is not a noun while fraction is a noun.

Word	Noun	Adjective	Verb	Adverb
fractional	No	Yes	No	No
fraction	Yes	No	Yes	No

fractional (noun)	fraction (noun)
	a small part or item forming a piece of a whole
	the quotient of two rational numbers
	a component of a mixture that has been separated by a fractional process

fractional (adjective)	fraction (adjective)
constituting or comprising a part or fraction of a possible whole or entirety
constituting a division or an aliquot part of the basic monetary unit

fractional (verb)	fraction (verb)
	perform a division