Inconstancy is a related term of airiness.
As nouns the difference between inconstancy and airiness
is that inconstancy is lack of constancy; lack of consistency in thought, emotion or action while airiness is light or airy in quality or manner.
inconstancy
English
Noun
(
inconstancies)
Lack of constancy; lack of consistency in thought, emotion or action.
-
airiness
English
Noun
(-)
Light or airy in quality or manner.
insubstantiality