airiness vs airy

airiness is a noun but airy is not a noun.

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

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

airiness (adjective)	airy (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