blowhole

• POS: Noun
• HYPHEN: blow=hole

CIDE DICTIONARY

blowhole, n. 

•  A cavern in a cliff, at the water level, opening to the air at its farther extremity, so that the waters rush in with each surge and rise in a lofty jet from the extremity.  [1913 Webster]
•  A nostril or spiracle in the top of the head of a whale or other cetacean.  [1913 Webster]

  " There are two spiracles or blowholes in the common whales, but only one in sperm whales, porpoises, etc."  [1913 Webster]
•  A hole in the ice to which whales, seals, etc., come to breathe.  [1913 Webster]
•  An air hole in a casting.  [1913 Webster]

THESAURUS

blowhole

air duct, air hole, air passage, air shaft, air tube, airway, armhole, avenue, breathing hole, bullet-hole, bunghole, channel, chute, cringle, deadeye, debouch, door, egress, emunctory, escape, estuary, exhaust, exit, eye, eyelet, floodgate, flume, gasket, grommet, guide, keyhole, knothole, loop, loophole, louver, louverwork, manhole, mousehole, naris, nostril, opening, out, outcome, outfall, outgate, outgo, outlet, peephole, pigeonhole, pinhole, placket, placket hole, pore, port, porthole, punch-hole, sally port, shaft, sluice, spilehole, spiracle, spout, tap, touchhole, transom, vent, ventage, venthole, ventiduct, ventilating shaft, ventilator, vomitory, way out, weir, wind tunnel

ROGET THESAURUS

blowhole

Airpipe

N airpipe, air pipe, air tube, airhole, blowhole, breathinghole, venthole, shaft, flue, chimney, funnel, vent, nostril, nozzle, throat, weasand, trachea, bronchus, bronchia, larynx, tonsils, windpipe, spiracle, ventiduct, ventilator, louvre, jalousie, Venetian blinds, blowpipe, pipe, jhilmil, smokestack, screen, window screen, ' artificial lung, iron lung, heart and lung machine.