vent vs orifice

vent and orifice both are nouns.

Word	Noun	Adjective	Verb	Adverb
vent	Yes	No	Yes	No
orifice	Yes	No	No	No

As nouns, orifice is a hypernym of vent; that is, orifice is a word with a broader meaning than vent:

Other hypernyms of vent include opening, porta.

vent (noun)	orifice (noun)
activity that frees or expresses creative energy or emotion	an aperture or hole that opens into a bodily cavity
external opening of urinary or genital system of a lower vertebrate
a hole for the escape of gas or air
a slit in a garment (as in the back seam of a jacket)
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt

vent (verb)	orifice (verb)
expose to cool or cold air so as to cool or freshen
give expression or utterance to