| Main Entry: | |
| Part of Speech: | noun |
| Definition: | pipe |
| Synonyms: | channel, chimney, duct, exhaust pipe, passage, smoke duct, tube, vent |
| Main Entry: | vent |
| Part of Speech: | noun |
| Definition: | outlet |
| Synonyms: | aperture, avenue, chimney, drain, duct, exit, flue, hole, opening, orifice, pipe, split, spout, ventilator |
| Antonyms: | closure, door |
| Main Entry: | shaft |
| Part of Speech: | noun |
| Definition: | long part of something |
| Synonyms: | arrow, axis, axle, bar, barb, beam, chimney, column, conduit, cylinder, diaphysis, duct, flue, handle, helve, hole, lance, missile, monolith, obelisk, pillar, pinnacle, pole, ray, rod, spear, spindle, spire, thill, tongue, tunnel, vent |