affluent
arm
armlet
bay
belt
bight
billabong
boca
branch
confluent
confluent stream
cove
creek
dendritic drainage pattern
effluent
estuary
euripus
feeder
fjord
fork
frith
gulf
gut
harbor
inlet
kyle
loch
mouth
narrow
narrow seas
narrows
natural harbor
prong
reach
road
roads
roadstead
slough
sound
strait
straits
tributary
lake
coulee
firth
gully
lacustrine
lagoon
modest-sized
rivulet
runlet
sinkhole
streamlet
watercourse
waterway