bulwark Synonyms

groyne jetty breakwater wall groin rampart mole seawall ravelin redan protector redoubt protection presidio revetment machicolation mainstay mantelet moat mound parapet murage outwork palisade parados safeguard screen sea wall break water busman Rock of Gibraltar gram molecule mol overprotection retaining wall shin guard fortifications seat belt arc-boutant crenellation shield stockade stronghold tenaille vallation cornerstone baby-sit bamboo curtain roadblock ramparts