lightness vs airiness

lightness and airiness both are nouns.

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

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

Other hyponyms of lightness include buoyancy.

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