(n.) Alt. of Wear.

aboideau air lock arch dam avenue backstop bamboo curtain bank bar barrage barrier bear-trap dam beaver dam blowhole boom breakwater breastwork brick wall buffer bulkhead bulwark channel chute cofferdam dam debouch defense dike ditch dock gate door earthwork egress embankment emunctory escape estuary exhaust exit fence flood-hatch floodgate flume gate gravity dam groin head gate hydraulic-fill dam iron curtain jam jetty leaping weir levee lock lock gate logjam loophole milldam moat mole mound opening out outcome outfall outgate outgo outlet parapet penstock pore port portcullis rampart roadblock rock-fill dam sally port seawall shutter dam sluice sluice gate spiracle spout stone wall tap tide gate vent ventage venthole vomitory wall water gate way out wicket dam work