#cask__barrel  a cylindrical container that holds liquids
  supertype:  vessel  an object used as a container (especially for liquids)
  subtype:  beer_barrel  butt  hogshead  keg  pickle_barrel  shook  tun  wine_cask
  part:  breech__rear_of_barrel__rear_of_tube  opening in the rear of the barrel of a gun where bullets can be loaded
     part:  breechblock__breech_closer  a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing
  part:  bung__spile  a plug used to close a hole in a barrel or flask
  part:  hoop.band__ring  a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling; "there was still a rusty iron hoop for tying a horse"
  part:  lag__stave  one of several thin slats of wood forming the sides of a barrel or bucket
  part:  spigot__tap  a plug for a bunghole in a cask

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