WordWeb Online

1. An embankment built around a space for defensive purposes
   "they stormed the bulwarks of the city"
   - rampart, wall
    
2. A fencelike structure around a deck (usually plural)
    
3. A protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
   - breakwater, groin, groyne, mole, seawall, jetty

1. Defend with a bulwark

Derived forms: bulwarked, bulwarking, bulwarks

Type of: barrier, defend, embankment

Part of: fortification, munition, ship

Encyclopedia: Bulwark