reversibility vs changeableness

reversibility and changeableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
reversibility	Yes	No	No	No
changeableness	Yes	No	No	No

As nouns, changeableness is a hypernym of reversibility; that is, changeableness is a word with a broader meaning than reversibility:

reversibility: the quality of being reversible in either direction
changeableness: the quality of being changeable; having a marked tendency to change

Other hypernyms of reversibility include changeability.

reversibility (noun)	changeableness (noun)
the quality of being reversible in either direction	the quality of being changeable; having a marked tendency to change