airy vs airiness

airy is not a noun while airiness is a noun.

Word	Noun	Adjective	Verb	Adverb
airy	No	Yes	No	No
airiness	Yes	No	No	No

airy (noun)	airiness (noun)
	the property of something weightless and insubstantial
	the property of something spacious and abounding in fresh air
	lightness in movement or manner

airy (adjective)	airiness (adjective)
characterized by lightness and insubstantiality; as impalpable or intangible as air
having little or no perceptible weight; so light as to resemble air
not practical or realizable; speculative
open to or abounding in fresh air