Source : WordNet®

payback
     n 1: financial return or reward (especially returns equal to the
          initial investment)
     2: the act of taking revenge (harming someone in retaliation
        for something harmful that they have done) especially in
        the next life; "Vengeance is mine; I will repay, saith the
        Lord"--Romans 12:19; "For vengeance I would do nothing.
        This nation is too great to look for mere revenge"--James
        Garfield; "he swore vengeance on the man who betrayed
        him"; "the swiftness of divine retribution" [syn: {vengeance},
         {retribution}]