unfair vs fairness

unfair is not a noun while fairness is a noun.

Word	Noun	Adjective	Verb	Adverb
unfair	No	Yes	No	No
fairness	Yes	No	No	No

unfair (noun)	fairness (noun)
	conformity with rules or standards
	the property of having a naturally light complexion
	the quality of being good looking and attractive
	ability to make judgments free from discrimination or dishonesty

unfair (adjective)	fairness (adjective)
not fair; marked by injustice or partiality or deception