#nail  a thin pointed piece of metal that is hammered into materials as a fastener
  supertype:  holdfast__fastener__fastening  restraint that attaches to something or holds something in place
  subtype:  brad  clout_nail  doornail  eightpenny_nail  fourpenny_nail  hobnail  sixpenny_nail  spike.nail  staple.nail  stub_nail  tack.nail  tenpenny_nail
  part:  head.projection  a projection out from one end; "the head of the nail", "a pinhead is the head of a pin"
  part:  nailhead  flattened boss on the end of nail opposite to the point
  part:  shank.cylinder__stem  cylinder forming a long narrow part of something

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