justness vs nicety

justness and nicety both are nouns.

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

As nouns, justness and nicety are synonyms defined as:

justness and nicety: conformity with some esthetic standard of correctness or propriety

Other synonyms of justness include rightness.

justness (noun)	nicety (noun)
the quality of being just or fair	conformity with some esthetic standard of correctness or propriety
conformity with some esthetic standard of correctness or propriety	a subtle difference in meaning or opinion or attitude