#embankment  a long artificial mound of stone or earth; built to hold back water or to support a road or as protection
  supertype:  mound__hill  structure consisting of an artificial heap or bank usually of earth or stones; "they built small mounds to hide behind"
  part:  revetement
  subtype:  rampart__bulwark__wall  an embankment built around a space for defensive purposes; "they stormed the ramparts of the city"; "they blew the trumpet and the walls came tumbling down"
     subtype:  bailey  the outer defensive wall that surrounds the outer courtyard of a castle
     subtype:  battlement__crenelation  a rampart built around the top of a castle with regular gaps for firing arrows or guns
     subtype:  Chinese_Wall__Great_Wall_of_China  a fortification 1,500 miles long built across northern China in the 3rd century BC
     subtype:  earthwork  an earthen rampart
     subtype:  fraise  sloping or horizontal rampart of pointed stakes

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