payback

Noun

• the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the next life; I will repay, saith the Lord"--Romans 12:19
  • Vengeance is mine
    
  • 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
    

• financial return or reward (especially returns equal to the initial investment)

Related words

• Synonyms: 
  vengeance , retribution