| channel(noun, line, water, link, way) |
| aqueduct(noun, line, water, way, course) |
| canal(noun, line, water, way, course) |
| course(noun, water, path, channel, passage) |
| flume(noun, water, course, passage, passageway) |
| passageway(noun, water, course, flume) |
| raceway(noun, water, course, passageway, flume) |
| waterway(noun, water, course, channel, trench) |
| racecourse(noun, water, course, passageway, flume) |
| pipe(noun, course, drain, means, route) |
| duct(noun, line, way, course, drain) |
| main(noun, line, course, means, route) |
| watercourse(noun, line, water, course, drain) |
| drain(noun, race, channel, off, trench) |
| passage(noun, line, bar, link, way) |
| culvert(noun, ditch, passage) |
| pipeline(noun, course, channel, passage, cylinder) |
| tube(noun, line, way, course, drain) |
| ditch(noun, course, drain, means, channel) |
| gutter(noun, drain, means, race, ditch) |