justness vs fairness

justness and fairness both are nouns.

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

As nouns, fairness is a hyponym of justness; that is, fairness is a word with a more specific, narrower meaning than justness:

Other hyponyms of justness include equity, right, rightfulness.

justness (noun)	fairness (noun)
the quality of being just or fair	conformity with rules or standards
conformity with some esthetic standard of correctness or propriety	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