spreading vs airing

spreading and airing both are nouns.

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

As nouns, spreading and airing are synonyms defined as:

spreading and airing: the opening of a subject to widespread discussion and debate

Other synonyms of spreading include dissemination, public exposure.

spreading (noun)	airing (noun)
act of extending over a wider scope or expanse of space or time	the act of supplying fresh air and getting rid of foul air
the opening of a subject to widespread discussion and debate	a short excursion (a walk or ride) in the open air
process or result of distributing or extending over a wide expanse of space	the opening of a subject to widespread discussion and debate