fortress Synonyms

stronghold citadel castle bulwark fort fortification bastion redoubt stockade parapet rook presidio refuge protection rampart castles tower fasthold forts defenses Towers command post casbah bastille safehold vallation turret palace outwork mansion chateau bunker breastwork blockhouse battlement base barrier barricade alcazar defense donjon keep holdfast hold guard garrison fastness embattlement earthwork dungeon