THESAURUS
Eustachian tube, Fallopian tube, adit, aqueduct, canal, channel, conduit, course, ditch, egress, emunctory, entrance, exit, fistula, ingress, intestines, meatus, ostium, oviduct, passage, passageway, pore, salpinx, thoracic
duct, trench, trough, troughing, troughway, tunnel, ureter, urethra, vagina, vas, vessel, watercourse, way
ROGET THESAURUS
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.