wind tunnel n 1: a structure resembling a tunnel where air is blown at known velocities for testing parts of aircraft
23 Moby Thesaurus words for "wind tunnel": air duct, air hole, air passage, air shaft, air tube, airway, blowhole, breathing hole, louver, louverwork, naris, nostril, shaft, spilehole, spiracle, touchhole, transom, vent, ventage, venthole, ventiduct, ventilating shaft, ventilator