Earthworks are structures made of earth, such as mounds, embankments, trenches, and ramparts. RAMPART is a 7-letter word meaning a defensive wall of earth or stone built around a castle or town. TRENCH is a 6-letter word meaning a long, narrow ditch dug in the ground, usually as part of a military defense. FORTIFICATION is a 13-letter word meaning the process of strengthening a place against attack by building fortifications. BERM is a 4-letter word meaning a mound of earth or sand built as a barrier or boundary. Agger is a 5-letter word meaning an ancient Roman embankment or RAMPART. PARAPET is a 7-letter word meaning a low protective wall along the edge of a roof, bridge, or balcony. DYKE is a 4-letter word meaning a long, deep ditch, typically filled with water, used to prevent flooding or as a boundary. REDAN is a 5-letter word meaning a type of FORTIFICATION consisting of two faces forming an angle, used to defend against attack. All of these words are related to the term earthwork, which is a structure made of earth.