outing vs airing

outing and airing both are nouns.

Word	Noun	Adjective	Verb	Adverb
outing	Yes	No	No	No
airing	Yes	No	No	No

As nouns, airing is a hyponym of outing; that is, airing is a word with a more specific, narrower meaning than outing:

Other hyponyms of outing include field trip.

outing (noun)	airing (noun)
a journey taken for pleasure	the act of supplying fresh air and getting rid of foul air
a day devoted to an outdoor social gathering	a short excursion (a walk or ride) in the open air
	the opening of a subject to widespread discussion and debate