fraction vs fractional

fraction is a noun but fractional is not a noun.

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

fraction (noun)	fractional (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

fraction (adjective)	fractional (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

fraction (verb)	fractional (verb)
perform a division