conformance vs justness

conformance and justness both are nouns.

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

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

conformance: correspondence in form or appearance
justness: conformity with some esthetic standard of correctness or propriety

Other hyponyms of conformance include nicety, rightness, normality.

conformance (noun)	justness (noun)
correspondence in form or appearance	the quality of being just or fair
	conformity with some esthetic standard of correctness or propriety