#substitution__exchange  the act of putting one one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help
  supertype:  change  the action of changing something; "the change of government had no impact on the economy"; "his change on abortion cost him the election"
  subtype:  commutation  the substitution of one method of payment for another
  subtype:  replacing__replacement  the act of furnishing an equivalent person or thing in the place of another; "replacing the star will not be easy"
     subtype:  novation  (law) the replacement of one obligation by another by mutual agreement of both parties; usually the replacement of one of the original parties to a contract with the consent of the remaining party
     subtype:  pitching_change  replacing a pitcher in baseball
     subtype:  supersedure__supersession  act of replacing one person or thing by another especially one held to be superior
     subtype:  supplanting__displacement  act of taking the place of another especially using underhanded tactics
  subtype:  subrogation  (law) the act of substituting of one creditor for another
  subtype:  weaning__ablactation  the act of substituting other food for the mother's milk in the diet of a child or young mammal

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