French door, anchorage, anchorage ground, arch dam, archway, back door, backstop, bamboo curtain, bank, bar, barrage, barrier, barway, basin, bear-trap dam, beaver dam, berth, boom, brattice, breakwater, breastwork, brick wall, buffer, buffer state, bulwark, bumper, carriage entrance, cellar door, cellarway, cloison, cofferdam, collision mat, cushion, dam, defense, diaphragm, dike, dissepiment, ditch, dividing line, dividing wall, division, dock, dockage, dockyard, door, doorjamb, doorpost, doorway, dry dock, earthwork, embankment, fence, fender, front door, gate, gatepost, gateway, gravity dam, groin, harbor, harborage, hatch, hatchway, haven, hydraulic-fill dam, interseptum, iron curtain, jam, jetty, jutty, landing, landing place, landing stage, leaping weir, levee, lintel, logjam, marina, mat, midriff, midsection, milldam, moat, mole, moorings, mound, pad, panel, parapet, paries, partition, party wall, pier, porch, port, portal, portcullis, porte cochere, postern, property line, propylaeum, protected anchorage, pylon, quay, rampart, road, roadblock, roads, roadstead, rock-fill dam, scuttle, seaport, seawall, separation, septulum, septum, shipyard, shock pad, shutter dam, side door, slip, stile, stone wall, storm door, threshold, tollgate, trap, trap door, turnpike, turnstile, wall, weir, wharf, wicket dam, work