| channel(noun, sound, line, water, thing) |
| aqueduct(noun, line, water, way, course) |
| conduit(noun, line, water, thing, way) |
| waterway(noun, water, course, drain, ditch) |
| course(noun, water, path, channel, conduit) |
| flume(noun, water, course, conduit, passageway) |
| raceway(noun, water, course, passageway, flume) |
| passageway(noun, water, course, opening, flume) |
| racecourse(noun, water, course, passageway, flume) |
| watercourse(noun, line, water, course, means) |
| ditch(noun, line, drain, means, route) |
| duct(noun, line, way, means, track) |
| trench(noun, line, drain, ditch, channel) |
| passage(noun, sound, line, way, course) |
| pipe(noun, thing, course, opening, means) |
| gutter(noun, line, thing, drain, means) |
| trough(noun, depression, course, drain, means) |
| sewer(noun, line, thing, way, course) |
| canalize |
| culvert(noun, ditch, conduit) |