- Bulwark - Defensive embankment - Defensive mound - Surrounding fortified embankment - That which fortifies and defends from assault; that which
secures safety; a defense or bulwark. - A broad embankment of earth round a place, upon which the
parapet is raised. It forms the substratum of every permanent
fortification. - To surround or protect with, or as with, a rampart or
ramparts.