Source : WordNet®

unfairness
     n 1: partiality that is not fair or equitable [syn: {inequity}]
          [ant: {fairness}]
     2: injustice by virtue of not being equitable [syn: {inequity}]
        [ant: {fairness}, {fairness}]
     3: an unjust act [syn: {injustice}, {iniquity}]