#customer__client  someone who pays for goods or services
  supertype:  consumer  a person who uses goods or services
  member of:  business_relation
  subtype:  buyer__purchaser__emptor__vendee  a person who buys
     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
  subtype:  guest  a customer of a hotel or restaurant etc.
     subtype:  no-show  a guest who fails to notify a hotel or restaurant when canceling a reservation
     subtype:  overnighter  a guest who stays overnight
  subtype:  frequenter__patron  a regular customer
     subtype:  operagoer  a patron of the opera
     subtype:  habitue__regular  a regular patron: "an habitue of the racetrack"
  subtype:  policyholder  an insured person; the client in whose name an insurance policy is written
  subtype:  shopper  someone who visits stores in search of articles to buy
     subtype:  bargain_hunter__bargainhunter  a shopper who hunts for bargains
  subtype:  spender__disburser__expender  someone who spends money to purchase goods or services
  subtype:  subscriber.customer__reader  someone who contracts to receive and pay for a certain number of issues of a publication
  subtype:  taker.customer  one who accepts an offer
  subtype:  warrantee  one to whom a warrant or guarantee is given
  subtype:  john__whoremaster__whoremonger  a prostitute's customer

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