approach
aqueduct
arroyo
artery
avenue
canal
canyon
carrier
chamber
chase
conduit
couch
course
den
dig
ditch
duct
fluting
furrow
gouge
groove
gully
gutter
hovel
japan
lair
main
means
medium
pass
passage
pipe
raceway
retreat
route
runway
sewer
shelter
slit
sound
strait
tideway
trap
trapped
travel
travelling
trough
tube
tunnel
vein
vision black
watercourse
way
white