unexchangeability the quality of being incapable of exchange or interchange
changeability,
changeableness the quality of being changeable; having a marked tendency to change; "the changeableness of the weather"
duality (geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry
transferability the quality of being transferable or exchangeable; "sterling transferability affords a means of multilateral settlement for....trade between nondollar countries"
convertibility the quality of being exchangeable (especially the ability to convert a currency into gold or other currencies without restriction)
inconvertibility the quality of not being exchangeable; "the inconvertibility of their currency made international trade impossible"
