airiness vs lightness

airiness and lightness both are nouns.

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

As nouns, lightness is a hypernym of airiness; that is, lightness is a word with a broader meaning than airiness:

Other hypernyms of airiness include weightlessness.

airiness (noun)	lightness (noun)
the property of something weightless and insubstantial	the trait of being lighthearted and frivolous
the property of something spacious and abounding in fresh air	the visual effect of illumination on objects or scenes as created in pictures
lightness in movement or manner	the property of being comparatively small in weight
	having a light color
	the gracefulness of a person or animal that is quick and nimble
	a feeling of joy and pride