access
adit
aisle
alley
ambulatory
aperture
aqueduct
arcade
artery
avenue
canal
channel
cloister
colonnade
communication
connection
corridor
course
covered way
defile
ditch
duct
egress
entrance
exit
ferry
ford
gallery
ingress
inlet
interchange
intersection
junction
lane
opening
outlet
overpass
pass
passage
passageway
portico
railroad tunnel
traject
trajet
trench
trough
troughing
troughway
tunnel
flue
millrace
millrun
penstock
sluice
sluiceway
spill
spillway
tube
tubing
wasteweir
waterspout
bulkhead
cable
circuitry
connector
drain
fitting
fixture
generator
girder
hose
pipe
plug
plumb
reservoir
sewer
valve
vent