Justice
Part of speech: noun
Definition: The state or characteristic of being just or fair. The ideal of fairness, impartiality, etc., especially with regard to the punishment of wrongdoing. Judgment and punishment of a party who has allegedly wronged (an)other(s). The civil power dealing with law. A judge of certain courts. Also capitalized as a title. Correctness, conforming to reality or rules.
Example sentence: I have always found that mercy bears richer fruits than strict justice.
Justness
Part of speech: noun
Definition: the state of being just