#tack.nail  a short nail with a sharp point and a large head
  supertype:  nail  a thin pointed piece of metal that is hammered into materials as a fastener
  subtype:  carpet_tack  used to nail down carpets
  subtype:  thumbtack__drawing_pin__drawingpin__pushpin  a tack for attaching papers to a bulletin board or drawing board
  subtype:  tintack  tack or small nail of tinned iron

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