THESAURUS
Aqueduct
arroyo, bed, canal, canalization, channel, conduit, course, creek bed, crimp, culvert, cut, dike, ditch, donga, dry bed, duct, entrenchment, flume, fosse, goffer, gulch, gully, gullyhole, gutter, ha-ha, headrace, irrigation ditch, kennel, moat, nullah, pleat, race, river bed, riverway, runnel, sluice, spillbox, spillway, stream bed, streamway, sunk fence, swash, swash channel, tailrace, trench, trough, wadi, water carrier, water channel, water furrow, water gap, water gate, watercourse, waterway, waterworks
ROGET THESAURUS
Aqueduct
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.