THESAURUS
tube
Amtrak, L, Photronic cell, adjutage, amplifier, anode, attenuator, audio-frequency
tube, baggage train, ballast regulator, ballast
tube, barrel, base, beam-switching
tube, bole, branch, cable railroad, cable railway, cask, catheter, cathode, cathode-ray
tube, channel, choo-choo, cog railroad, cog railway, color kinescope, column, convertor, current regulator, cylinder, cylindroid, damper, detector, direct-viewing
tube, discharge
tube, discriminator, dissector
tube, doubler, drainpipe, drum, efflux
tube, el, electric, electric railway, electric train, electrode, electron-image
tube, elevated, elevated railway, embankment, express, express train, feeder, feeder line, filament, fire hose, flier, flue pipe, flume, focus
tube, freight, freight train, freighter, funicular, funnel, garden hose, gas phototube, gas pipe, generator, goods train, gravity-operated railway, grid, horse railway, hose, hosepipe, iconoscope, image dissector, image iconoscope, interurban, inverter, junction, kinescope, light railroad, lightning express, limited, limiter, line, local, local-oscillator
tube, main line, metro, milk train, mixer
tube, modulator, monorail, monoscope, multiplier, multiplier phototube, multipurpose
tube, multivibrator, nipple, organ pipe, oscillator, output
tube, parliamentary, parliamentary train, passenger train, phase inverter, photocathode, photoconductor cell, photomultiplier
tube, phototube, photovoltaic cell, picture
tube, pillar, pipe, pipeline, pipette, piping, plate, power
tube, pulse generator, put through channels, rack railway, rack-and-pinion railroad, rack-and-pinion railway, radio
tube, radio-frequency
tube, rail, rail line, railroad, railroad train, railway, rattler, receiving
tube, rectifier
tube, reed, reed pipe, regulator, repeater, roadbed, roadway, roll, roller, rolling stock, rouleau, shuttle, shuttle train, siamese, siamese connection, sidetrack, siding, siphon, snorkel, soft phototube, soil pipe, special, standpipe, steam pipe, stem, straw, streamliner, street railway, streetcar line, subway, switchback, tap, terminal, terminus, track, train, tram, tramline, transducer, trestle, trigatron, trigger
tube, trolley line, trunk, trunk line, tubing, tubulation, tubule, tubulet, tubulure, turnout, underground, vacuum phototube, vacuum
tube, valve, waste pipe, water pipe, way train
ROGET THESAURUS
tube
Opening
N
opening, hole, foramen, puncture, perforation, fontanel, transforation, pinhole, keyhole, loophole, porthole, peephole, mousehole, pigeonhole, eye of a needle, eyelet, slot, opening, aperture, apertness, hiation, yawning, oscitancy, dehiscence, patefaction, pandiculation, chasm, embrasure, window, casement, abatjour, light, sky light, fan light, lattice, bay window, bow window, oriel, dormer, lantern, outlet, inlet, vent, vomitory, embouchure, orifice, mouth, sucker, muzzle, throat, gullet, weasand, wizen, nozzle, placket, portal, porch, gate, ostiary, postern, wicket, trapdoor, hatch, door, arcade, cellarway, driveway, gateway, doorway, hatchway, gangway, lich gate, way, path, thoroughfare, channel, passage, passageway,
tube, pipe, water pipe, air pipe, vessel, tubule, canal, gut, fistula, adjutage, ajutage, ostium, smokestack, chimney, flue, tap, funnel, gully, tunnel, main, mine, pit, adit, shaft, gallery, alley, aisle, glade, vista, bore, caliber, pore, blind orifice, fulgurite, thundertube, porousness, porosity, sieve, cullender, colander, cribble, riddle, screen, honeycomb, apertion, perforation, piercing, terebration, empalement, pertusion, puncture, acupuncture, penetration, key, opener, master key, password, combination, passe- partout, open, perforated, perforate, wide open, ajar, unclosed, unstopped, oscitant, gaping, yawning, patent, tubular, cannular, fistulous, pervious, permeable, foraminous, vesicular, vasicular, porous, follicular, cribriform, honeycombed, infundibular, riddled, tubulous, tubulated, piped, tubate, opening, aperient, Int, open sesame!.