noun (n)

• a sum of money paid or a claim discharged(noun.possession)

  Antonym:
  default, nonpayment, nonremittal
  

  source: wordnet30
• the act of paying money(noun.act)

  Synonym:
  defrayal, defrayment
  Antonym:
  evasion, nonpayment
  

  source: wordnet30
• an act of requiting; returning in kind(noun.act)

  Synonym:
  requital
  

  source: wordnet30
• The act of paying, or giving compensation; the discharge of a debt or an obligation.(noun)

  source: webster1913