vent vs give vent

vent is a noun but give vent is not a noun.

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

As verbs, vent and give vent are synonyms defined as:

Other synonyms of vent include ventilate.

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