interchangeableness

from WordNet (r) 3.0 (2006)

interchangeableness
    n 1: the quality of being capable of exchange or interchange
         [syn: {exchangeability}, {interchangeability},
         {interchangeableness}, {fungibility}] [ant:
         {unexchangeability}]

from The Collaborative International Dictionary of English v.0.48

Interchangeable \In`ter*change"a*ble\, a. [Cf. OF.
   entrechangeable.]
   [1913 Webster]
   1. Admitting of exchange or mutual substitution.
      "Interchangeable warrants." --Bacon.
      [1913 Webster]

   2. Following each other in alternate succession; as, the four
      interchangeable seasons. --Holder. --
      {In`ter*change"a*ble*ness}, n. -- {In`ter*change"a*bly},
      adv.
      [1913 Webster]