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Synonyms for Vent (same or very similar meaning)

WordNet sense 1 (a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt):
volcano

WordNet sense 2 (a hole for the escape of gas or air):
blowhole, venthole, vent-hole

WordNet sense 3 (activity that frees or expresses creative energy or emotion):
outlet, release, release

WordNet sense 4 (give expression or utterance to):
ventilate, give vent

WordNet sense 5 (expose to cool or cold air so as to cool or freshen):
air, air out


From the ODE community, based on WordNetadd/edit