vent vs air out

vent is a noun but air out is not a noun.

Word	Noun	Adjective	Verb	Adverb
vent	Yes	No	Yes	No
air out	No	No	Yes	No

As verbs, vent and air out are synonyms defined as:

Other synonyms of vent include air, ventilate.

vent (noun)	air out (noun)
activity that frees or expresses creative energy or emotion
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)	air out (verb)
expose to cool or cold air so as to cool or freshen	expose to cool or cold air so as to cool or freshen
give expression or utterance to	expose to fresh air