Synonyms and related words :
abatis, acropolis, advanced work, balistraria, bank, banquette, barbed-wire entanglement, barbican, barricade, barrier, bartizan, battlement, beachhead, blockhouse, breastwork, bridgehead, bulwark, bunker, casemate, castle, cheval-de-frise, circumvallation, citadel, contravallation, counterscarp, curtain, demibastion, dike, donjon, drawbridge, earthwork, enclosure, entanglement, escarp, escarpment, fasthold, fastness, fence, fieldwork, fort, fortalice, fortification, fortress, garrison, garrison house, glacis, hold, keep, loophole, lunette, machicolation, mantelet, martello, martello tower, merlon, mote, motte, mound, outwork, palisade, parados, parapet, peel, peel tower, pillbox, portcullis, post, postern gate, rampart, rath, ravelin, redan, redoubt, safehold, sally port, scarp, sconce, stockade, strong point, stronghold, tenaille, tower, tower of strength, vallation, vallum, ward, work,