Breakwater

n.

1.

Any structure or contrivance, as a mole, or a wall at the mouth of a harbor, to break the force of waves, and afford protection from their violence.

Noun

1.

breakwater - a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away Synonyms: groyne, jetty, seawall, groin, bulwark, mole

abutment, anchorage, anchorage ground, arc-boutant, arch dam, backstop, bamboo curtain, bank, bar, barrage, barrier, basin, beam, bear-trap dam, beaver dam, berth, bill, boom, breastwork, brick wall, buffer, bulkhead, bulwark, buttress, buttress pier, buttressing, cape, chersonese, cofferdam, coral reef, dam, defense, delta, dike, ditch, dock, dockage, dockyard, dry dock, earthwork, embankment, fence, flying buttress, foreland, gate, gravity dam, groin, hanging buttress, harbor, harborage, haven, head, headland, hook, hydraulic-fill dam, iron curtain, jam, jetty, jutty, landing, landing place, landing stage, leaping weir, levee, logjam, marina, milldam, moat, mole, moorings, mound, mull, naze, ness, parapet, peninsula, pier, pier buttress, point, port, portcullis, promontory, protected anchorage, quay, rampart, reef, retaining wall, road, roadblock, roads, roadstead, rock-fill dam, sandspit, seaport, seawall, shipyard, shoulder, shutter dam, slip, spit, spur, stone wall, tongue, wall, weir, wharf, wicket dam, work