payback \payback\ n.
   same as retribution. informal
   pjc

   2. same as requital. informal
      pjc
see also:
retribution requital 

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
see also:
vengeance retribution