contravallation Synonyms

abatis machicolation merlon mound outwork palisade parados parapet portcullis rampart ravelin redan scarp stoccado stockade tenaille vallation vallum intrenchment glacis fortification balistraria bank banquette barricade barrier battlement bulwark casemate cheval-de-frise circumvallation countervallation demibastion dike escarp fence fieldwork fortalice cimcumvallation