Bulwark
Part of speech: noun
Definition: A defensive wall or rampart. A defense or safeguard. A breakwater. The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard.
Part of speech: verb
Definition: To fortify something with a wall or rampart. To provide protection of defense for something.
Jetty
Part of speech: noun
Definition: A part of a building that jets or projects beyond the rest, and overhangs the wall below.A wharf or pier extending from the shore.(Hydraulic engineering): A structure of wood or stone extended into the sea to influence the current or tide, or to protect a harbor; a mole; as, the Eads system of jetties at the mouth of the Mississippi River.
Part of speech: verb
Definition: To jut out; to project.
Part of speech: adjective
Definition: Made of jet, or like jet in color.