bastion Synonyms

citadel base complex protection prop presidio parapet palisade outwork murage mantlet mantelet mainstay machicolation keep guard rampart ravelin fortifications tower of strength airbase beachhead wall vallation tower tenaille support stronghold rock resistance redoubt redan fortress fortification bunker bulwark bridgehead breastwork blockhouse battlement bartizan barrier barricade barbican barbacan alcazar aegis castellation castle chateau fortalice