#buyer__purchaser__emptor__vendee  a person who buys
  supertype:  customer__client  someone who pays for goods or services
  subtype:  customer_agent  a foreign purchaser who buys goods outright for resale
  subtype:  home_buyer  someone buying a house
  subtype:  orderer  someone who places an order to buy

No statement uses or specializes buyer; click here to add one.