A boat is composed of many parts, including the STEM (4 letters), which is the front part of the boat; the RUDDER (6 letters), which is a flat piece of wood or metal that is used to steer the boat; the KEEL (4 letters), which is a long, thick beam that runs along the bottom of the boat; the HULL (4 letters), which is the main body of the boat; the gunwale (7 letters), which is the upper edge of the boat's sides; the AFT (3 letters), which is the back part of the boat; and the STERN (5 letters), which is the rear end of the boat.