Synonyms to frontier post

bamboo curtain, Berlin wall, Pillars of Hercules, arch dam, backstop, bank, bar, barrage, barrier, barrier of secrecy, bear-trap dam, beaver dam, blackout, boom, border, border ground, borderland, breakwater, breastwork, brick wall, buffer, bulkhead, bulwark, censorship, cofferdam, curtain, dam, defense, dike, ditch, earthwork, embankment, fence, frontier, gate, gravity dam, groin, hush-up, hydraulic-fill dam, iron curtain, ironbound security, jam, jetty, leaping weir, levee, logjam, march, marches, marchland, milldam, moat, mole, mound, oath of secrecy, official secrecy, outpost, outskirts, pall, parapet, portcullis, rampart, repression, roadblock, rock-fill dam, seal of secrecy, seawall, security, shutter dam, smothering, stifling, stone wall, suppression, three-mile limit, twelve-mile limit, veil, veil of secrecy, wall, weir, wicket dam, work, wraps, Bowery, China, Chinatown, Darkest Africa, East End, East Side, God knows where, Greenland, Little Hungary, Little Italy, North Pole, Outer Mongolia, Pago Pago, Siberia, South Pole, Stadt, Thule, Tierr