Source : Webster's Revised Unabridged Dictionary (1913)

Exchangeability \Ex*change`a*bil"i*ty\, n.
   The quality or state of being exchangeable.

         The law ought not be contravened by an express article
         admitting the exchangeability of such persons.
                                                  --Washington.

Source : WordNet®

exchangeability
     n : the quality of being capable of exchange or interchange
         [syn: {interchangeability}, {interchangeableness}, {fungibility}]
         [ant: {unexchangeability}]