redoubt Synonyms

forts presidio parapet palisade outwork murage keep guard glacis garrison fortress protection rampart ravelin fortifications alamo wall vauntmure vallation tower stronghold stockade sconce redan fortresses fortification fortalice bulwark breastwork blockhouse bastion barrier barricade barbican barbacan banquette balistraria castle chateau citadel fort fence fastness embankment earthwork dread donjon dike defense curtain