moat Synonyms

fosse rift rampart pit mole mine lock-weir kennel intrenchment hornwork hole gutter gurgoyle support trench trough trenches entrenchment foxhole watercourse roadblock waterway wall tunnel gully gulf groove coupure counterguard conduit chasm channel canal bunker bulwark buffer boom barrier barricade bank culvert cut furrow fossa flume fence excavation embankment dyke duct