earthwork
earth.work \-.w*rk\ n 1: an embankment or other construction made of earth; esp : one use d as a field fortification 2: the operations connected with excavations and embankments of earth
Webster's English Dictionaryearth.work \-.w*rk\ n 1: an embankment or other construction made of earth; esp : one use d as a field fortification 2: the operations connected with excavations and embankments of earth