fortress, fortifications, battlement, citadel, bulwarks, fortresses, palisades, motte, triumphal arch, fort, monuments, torii, crenellations, gun emplacement, impregnability, metopes, entrenchments, stelae, hoplites, herodian, edifice, acropolis, stupa, promontories, pyramids, maginot line, revetments, cordon sanitaire, housetops, watchtower, brutalism, mamelukes, tumulus, nebuchadnezzar ii, besiegers, redoubt, byzantine empire, sepulchers, tuileries palace, embankments, magadha, bastions, hellenist, peristyle, judaize, tufa, massifs, visigothic, sentry, propylaea, henge, railing, ziggurat, caryatids, blockhouse, granaries, porticoes, arch, palace, domitian, impostures, lintels, earthen, precipices, barbed wire, apadana, ramesses ii, manchu dynasty, punic, portcullis, suzerain, castle, viziers, ctesiphon, zionism, turrets, megaliths, palings, kremlin, tenochtitlan, hindu kush mountains, stupas, mantling, ratlines, moat, cliffs, stockades, elbe river, parapets, laager, hyksos, balustrade, stele, hilltops, barricade, monolith, apse, eyries, chasms, despotism, dolmen, entablature, ramparts, embankment, palisade, buttress, ditch, colonnade, parapet, dike, breakwater, gate, mound, pier, stockade, tower, causeway, antonine, rammed, unexcavated, basement, block, brick, cobble, concrete, excavated, frame, hadrianic, plank, reservoir, superincumbent, terrace, thicker, wall, apsidal, arcade, arcaded

bailey, chinese wall, crenelation, crenellation, earthwork, fraise, great wall of china

bastion, battlement, circumvallate, crenelation, crenellation, earthwork, fraise, terreplein

bulwark