| channel(noun, line, water, way, course) |
| canal(noun, line, water, way, course) |
| conduit(noun, line, water, way, course) |
| waterway(noun, water, course, passageway, flume) |
| course(noun, water, path, channel, conduit) |
| flume(noun, water, course, conduit, passageway) |
| passageway(noun, water, course, flume) |
| raceway(noun, water, course, passageway, flume) |
| racecourse(noun, water, course, passageway, flume) |
| duct(noun, line, way, means, track) |
| ditch(noun, conduit) |
| watercourse(noun, water, course, conduit, waterway) |
| gutter(noun, conduit) |
| waterworks(noun, conduit, canal, artificial waterway) |
| canal structure |
| pipe(noun, course, means, route, channel) |
| pipeline(noun, flow, channel, passage, cylinder) |
| sluice(noun, conduit) |
| trough(noun, course, means, race, flow) |
| gully(noun, conduit) |