vent vs smoke hole

vent and smoke hole both are nouns.

Word	Noun	Adjective	Verb	Adverb
vent	Yes	No	Yes	No
smoke hole	Yes	No	No	No

As nouns, smoke hole is a hyponym of vent; that is, smoke hole is a word with a more specific, narrower meaning than vent:

vent (noun)	smoke hole (noun)
activity that frees or expresses creative energy or emotion	a vent (as in a roof) for smoke to escape
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)	smoke hole (verb)
expose to cool or cold air so as to cool or freshen
give expression or utterance to