THESAURUS
porthole
air hole, armhole, bay, bay window, blowhole, bow window, bullet-hole, bunghole, casement, casement window, cringle, deadeye, eye, eyelet, fan window, fanlight, gasket, grille, grommet, guide, keyhole, knothole, lancet window, lantern, lattice, light, loop, loophole, louver window, manhole, mousehole, oriel, pane, peephole, picture window, pigeonhole, pinhole, placket, placket hole, port, punch-hole, rose window, skylight, spiracle, tap, transom, vent, venthole, wicket, window, window bay, window glass, windowpane
ROGET THESAURUS
porthole
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!.