I think its called a bunker
Yes some called it the big ditch or Clinton's Ditch.
The ditch around a castle is called a moat.
A deep ditch carved over time by running water is called a ravine.
Erie canal.
ditch
EURIPUS
The outer covering of the grain is called Husk.
The ditches at the sides of a country road are called "cunetas." Singular: "cuneta." (culverts). Trench, irrigation ditch = zanja
It's called a moat.
The ice covering 98% of the Antarctic continent is called an ice sheet.
It would have been called a ditch. World War I was starting in 1914 and large ditches played a major part in the land warfare. The were called "Trenches" and the soldiers who occupied them described them as a grave with both ends kicked out.
a covering on a bed is called a quilt