S: (n) access, approach (a way of entering or leaving) "he took a wrong turn on the access to the bridge"
S: (n) entrance, entranceway, entryway, entry, entree (something that provides access (to get in or get out)) "they waited at the entrance to the garden"; "beggars waited just outside the entryway to the cathedral"
S: (n) arch, archway (a passageway under a curved masonry construction) "they built a triumphal arch to memorialize their victory"
S: (n) doorway, door, room access, threshold (the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close) "he stuck his head in the doorway"
S: (n) portal (a grand and imposing entrance (often extended metaphorically)) "the portals of the cathedral"; "the portals of heaven"; "the portals of success"
S: (n) porte-cochere (a carriage entrance passing through a building to an enclosed courtyard)
S: (n) passage (a way through or along which someone or something may pass)
S: (n) adit (a nearly horizontal passage from the surface into a mine)
S: (n) aisle (a long narrow passage (as in a cave or woods))
S: (n) channel (a passage for water (or other fluids) to flow through) "the fields were crossed with irrigation channels"; "gutters carried off the rainwater into a series of channels under the street"
S: (n) gutter, trough (a channel along the eaves or on the roof; collects and carries away rainwater)
S: (n) moulin, glacier mill (a chute through which supraglacial water enters a glacier, boring either to the bedrock or to the depth of common crevasse formation) "the icy river plunged, roaring, into the moulin's blue depths"
S: (n) limbers (a channel or gutter on either side of a ship's keelson; carries bilge water into the pump well)
S: (n) conduit (a passage (a pipe or tunnel) through which water or electric wires can pass) "the computers were connected through a system of conduits"
S: (n) aqueduct (a conduit that resembles a bridge but carries water over a valley)
S: (n) catheter (a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open)
S: (n) endotracheal tube (a catheter that is inserted into the trachea through the mouth or nose in order to maintain an open air passage or to deliver oxygen or to permit the suctioning of mucus or to prevent aspiration of the stomach contents)
S: (n) nasotracheal tube (a tube inserted into the trachea through the nose and pharynx; used to deliver oxygen)
S: (n) condenser (a hollow coil that condenses by abstracting heat)
S: (n) column, chromatography column (a vertical glass tube used in column chromatography; a mixture is poured in the top and washed through a stationary substance where components of the mixture are adsorbed selectively to form colored bands)
S: (n) drain (tube inserted into a body cavity (as during surgery) to remove unwanted material)
S: (n) soil pipe (drain that conveys liquid waste from toilets, etc.)
S: (n) trap (drain consisting of a U-shaped section of drainpipe that holds liquid and so prevents a return flow of sewer gas)
S: (n) drilling pipe (a series of tubes (joined by screwed collars) that connect a drilling platform to the drilling bit; rotates the bit and supplies drilling mud)
S: (n) elbow (a length of pipe with a sharp bend in it)
S: (n) exhaust pipe (a pipe through which burned gases travel from the exhaust manifold to the muffler)
S: (n) fuel line, gas line, petrol line (a pipe that carries gasoline from a tank to a gasoline engine) "the car wouldn't start because dirt clogged the gas line"
S: (n) main (a principal pipe in a system that distributes water or gas or electricity or that collects sewage)
S: (n) calabash, calabash pipe (a pipe for smoking; has a curved stem and a large bowl made from a calabash gourd)
S: (n) calumet, peace pipe, pipe of peace (a highly decorated ceremonial pipe of Amerindians; smoked on ceremonial occasions (especially as a token of peace))
S: (n) silencer (short tube attached to the muzzle of a gun that deadens the sound of firing)
S: (n) siphon, syphon (a tube running from the liquid in a vessel to a lower level outside the vessel so that gravity forces the liquid through the tube)
S: (n) speaking tube (a tube for conveying the sound of a voice from one room to another)
S: (n) well (an open shaft through the floors of a building (as for a stairway))
S: (n) stairwell (a vertical well around which there is a stairway)
S: (n) tunnel (a passageway through or under something, usually underground (especially one for trains or cars)) "the tunnel reduced congestion at that intersection"
S: (n) catacomb (an underground tunnel with recesses where bodies were buried (as in ancient Rome))
S: (n) crossing, crosswalk, crossover (a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other)
S: (n) free throw lane (a lane on a basketball court extending from the end line to 15 feet in front of the backboard; players may not enter this lane during a free throw)
S: (n) divided highway, dual carriageway (a highway divided down the middle by a barrier that separates traffic going in different directions) "in Britain they call a divided highway a dual carriageway"
S: (n) street (a thoroughfare (usually including sidewalks) that is lined with buildings) "they walked the streets of the small town"; "he lives on Nassau Street"
S: (n) Wall Street, Wall St. (a street in lower Manhattan where the New York Stock Exchange is located; symbol of American finance)
S: (n) street (the part of a thoroughfare between the sidewalks; the part of the thoroughfare on which vehicles travel) "be careful crossing the street"
S: (n) one-way street (a street on which vehicular traffic is allowed to move in only one direction)
S: (n) two-way street (a street on which vehicular traffic can move in either of two directions) "you have to look both ways crossing a two-way street"
S: (n) Caledonian Canal (a canal in northern Scotland that links North Sea with the Atlantic Ocean; runs diagonally between Moray Firth at the northeastern end and Loch Linnhe at the southwestern end; now little used)
S: (n) Caloosahatchee Canal (a canal that connects Lake Okeechobee with the Caloosahatchee River in southern Florida to form part of the Cross-Florida Waterway)
S: (n) Grand Canal (an inland waterway 1000 miles long in eastern China; extends from Tianjin in the north to Hangzhou in the south)
S: (n) Erie Canal (an artificial waterway connecting the Hudson river at Albany with Lake Erie at Buffalo; built in the 19th century; now part of the New York State Barge Canal)
S: (n) New York State Barge Canal (a system of canals crossing New York State and connecting the Great Lakes with the Hudson River and Lake Champlain)
S: (n) flume (watercourse that consists of an open artificial chute filled with water for power or for carrying logs)
S: (n) headrace (a waterway that feeds water to a mill or water wheel or turbine)
S: (n) tailrace (a watercourse that carries water away from a mill or water wheel or turbine)