THESAURUS
watercourse
adolescent stream, aqueduct, arroyo, beck, bed, bourn, braided stream, branch, brook, brooklet, burn, canal, channel, conduit, course, creek, creek bed, crick, culvert, donga, dry bed, duct, flowing stream, flume, fluviation, fresh, freshet, gill, gulch, gully, gullyhole, headrace, irrigation ditch, kill, lazy stream, meandering stream, midchannel, midstream, millstream, moving road, navigable river, nullah, race, racing stream, river, river bed, riverway, rivulet, run, rundle, runlet, runnel, sike, sluice, spill stream, spillbox, spillway, stream, stream action, stream bed, streamlet, streamway, subterranean river, swash, swash channel, tailrace, wadi, water carrier, water channel, water furrow, water gap, water gate, waterway, waterworks
ROGET THESAURUS
watercourse
Conduit
N
conduit, channel, duct,
watercourse, race, head race, tail race, abito, aboideau, aboiteau, bito, acequia, acequiador, acequiamadre, arroyo, adit, aqueduct, canal, trough, gutter, pantile, flume, ingate, runner, lock-weir, tedge, vena, dike, main, gully, moat, ditch, drain, sewer, culvert, cloaca, sough, kennel, siphon, piscina, pipe, funnel, tunnel, water pipe, waste pipe, emunctory, gully hole, artery, aorta, pore, spout, scupper, adjutage, ajutage, hose, gargoyle, gurgoyle, penstock, weir, flood gate, water gate, sluice, lock, valve, rose, waterworks, pipeline, vascular.