battlement, crenelation, crenellation

fortifications, blockhouse, castle, lighthouse, fortress, stockade, garrison, fort ticonderoga, presidio, encampment, citadel, palisade, gun emplacement, monument, wigwam, log cabin, palace, battlement, flagstaff, ramparts, barracks, motte, schoolhouse, fort sumter, inn, outpost, watchtower, hut, springhouse, farmhouse, fortresses, cookhouse, cavalry, tuileries palace, cairn, entrenchments, gristmill, shallop, paddle steamer, manor house, caves, cavalrymen, antonine wall, musket, enactor, bluecoats, chateau, tollhouse, birchbark canoe, armory, skara brae, reenactor, museum, tipi, teepees, archaelogical, midden, broch, dolmen, martello tower, spyglass, seringapatam, earthen, regiment, adobe brick, hermitage, revetments, ctesiphon, granary, sutler, tumulus, monastery, cawnpore, hillfort, schooner, camp, mausoleum, colonial, dragoons, temple, manor, mandans, saltbox, cannoneers, statue, steamboat, cantonment, adobes, fieldstone, cavalryman, airfield, old ironsides, bastogne, mansion, colonists, hidatsa, cannons, palacio, watermill, archeological, cemetery, tepee, forts, fortification, redoubt, shipyard, synagogue, town, bastion, lodge, pueblo, building, depot, washington, grandfather, detroit, richmond, courtesy, hamilton, miami, scott, attest, beresford, cleveland, lafayette, mass., milwaukee, mount, pennsylvania, philadelphia, president, cincinnati

martello tower, tower of london

allen, arlington, barbette, black hole of calcutta, burgoyne, capitulation, catapult, effective, ethan allen, fort ticonderoga, fort up, garrison, gentleman johnny, john burgoyne, martello tower, neighbor, postern, recapture, scale, storm, ticonderoga

base, collect, congregate, defence, defense, defensive structure, enclose, gather, inclose, military post, place, post, send, shut in, station

fort up, fortify, fortress, garrison