fort, gun emplacement, springhouse, schoolhouse, gristmill, palisade, log cabin, stockade, tollhouse, presidio, lighthouse, reenactor, trestle bridge, dogtrot, braxton bragg, fortifications, fieldstone, cavalrymen, millrace, remagen, cookhouse, waterwheel, monument, destroyer escort, zouaves, truss bridge, armory, crossbeams, coquina, skirmishers, dragoons, ironmaster, entrenchments, oxbow, sutler, steamboat, flatboat, burying ground, dukw, barracks, revetments, greek revival, bateaux, pow camp, clapboard, chancellorsville, confederate soldier, stagecoach, archway, entryway, cannoneers, battleship, artilleryman, sugarhouse, casemate, covered bridge, encampment, cupola, postholes, suspension bridge, fort ticonderoga, belleau wood, martello tower, meetinghouse, fortress, quonset, battlement, catboat, old ironsides, gable roof, amtrac, reinforced concrete, seabee, shallop, motte, castle, icehouse, cairn, crenellations, cannonballs, museum, saltbox, railhead, quonset hut, triumphal arch, stanleyville, whaleback, gatehouse, hesper, cannons, footstone, lazaretto, caissons, regiment, bluecoats, graving dock, livery stable, riflemen, passageway, earthworks, wigwam, ironwork, redoubt, blockhouses, bastion, pier, tower, farmhouse, barricade, courthouse, dugout, minaret, bunker, citadel, fortification, jetty, rampart

fastness, stronghold