ampulla, lock, lock chamber

river, waterway, creek, lake, riverbed, aqueduct, lagoon, riverbank, estuary, tributary, dam, causeway, spillway, drainage ditch, headrace, weir, millrace, pond, watercourse, outfall, culvert, nullah, erie canal, bridge, oxbow, towpath, jetty, reservior, welland canal, sluiceway, pier, water, trestle bridge, menai strait, shoreline, distributary, flume, forebay, riverside, tidal basin, drawbridge, expressway, sewage, reservoir, breakwater, river basin, marina, marsh, streambed, intracoastal waterway, roadway, underpass, seaway, caledonian canal, bailey bridge, brahmaputra river, rivulet, gaillard cut, coulee, nala, batture, bascule bridge, marshland, embankment, elbe river, ganges, basin, anicut, pedestrian bridge, thoroughfare, mekong river, mudflats, seawall, footbridge, pontoon, dike, tombigbee river, ship canal, zambezi river, sluices, scheldt, highway, outboard motorboat, irrigation ditch, paddle steamer, spruit, bayou, cape fear river, quay, pontoon bridge, silt, dredging, gatun, inlet, millpond, riverfront, creek bed, tagus river, drainage, parkway, footpath, promenade, canals, groove, lateral, ramus, segment, cavity, posterior, foramen, lamina, tract, tunnel, foramina, nerve, opening, vestibule, arch, loop, orifice, ampulla, fissure, harbour, sewerage, interurban, railway, oversea, severn, canadian, commercial, haul, isthmian, road, transoceanic, farming, interisland, irrigation, isthmus, ocean, postal, rail

alimentary canal, alimentary tract, aqueductus cerebri, bile duct, canaliculus, canalis cervicis uteri, canalis vertebralis, cerebral aqueduct, cervical canal, common bile duct, cut, digestive tract, digestive tube, ductule, ductulus, ejaculatory duct, epididymis, gastrointestinal tract, gi tract, hepatic duct, industrial watercourse, lachrymal duct, lacrimal duct, lymphatic vessel, lymph vessel, pancreatic duct, pore, race, raceway, salivary duct, seminal duct, shipway, sinus, spinal canal, sylvian aqueduct, umbilical cord, ureter, urethra, vagina, vas deferens, venous sinus, vertebral canal

., ampulla, anus, aqueductus cerebri, arab-israeli war, arse, arteria alveolaris inferior, aspinwall, bacteroidaceae, benjamin disraeli, bernard, bowel, breadbasket, bridge, bruges, bulb, caledonian canal, canaliculus, canalisation, canalise, canalis cervicis uteri, canalis vertebralis, canalization, canalize, canal of schlemm, canal zone, canoe, cape cod canal, caudal anaesthesia, caudal anesthesia, caudal block, cerebral aqueduct, cerumen, cervical canal, chronic glaucoma, city of bridges, claude bernard, clinton, coarctation, colicky, colon, cut, dewitt clinton, digestible, disraeli, earwax, enteron, ependyma, erie, erie canal, external, family bacteroidaceae, ferdinand de lesseps, first earl of beaconsfield, flatulence, flatulency, flatulent, forceps delivery, fourth ventricle, gamal abdel nasser, gas, gassy, george washington goethals, gi series, goethals, gorgas, gota canal, gould, gulf of suez, gut, hairball, hair ball, head gate, heavy, hemorrhoidal vein, hindgut, industrial watercourse, inferior alveolar artery, inguinal hernia, intestine, inversion, isthmus of corinth, jay gould, jog, lake erie, lesseps, ligamentum teres uteri, light, lock, lockage, lockkeeper, lockman, lockmaster, lock chamber, medulla spinalis, nasser, open-angle glaucoma, ophthalmia neonatorum, otitis externa, panama canal, panama canal zone, pelvimetry, pound, presentation, president roosevelt, president theodore roosevelt, pulp cavity, queckenstedt's test, race, raceway, rectal vein, rectum, red sea, roosevelt, round ligament of the uterus, schenectady, schlemm's canal, shallow, shipway, ship canal, sinus venosus sclerae, small intestine, span, spinal canal, spinal cord, stenosed, stenosis, stenotic, stomach, strait of magellan, stricture, suez, suez canal, sylvian aqueduct, t'ien-ching, tail gate, theodore roosevelt, tianjin, tientsin, tooth, tow, towing path, towpath, transit, trichobezoar, tum, tummy, uterine cavity, uterine contraction, vagina, vena canaliculi cochleae, vena rectalis, ventricle, vertebral canal, vicomte ferdinand marie de lesseps, william crawford gorgas, yom kippur war

channel, conduit, furnish, passage, passageway, provide, render, sound, supply

duct