Inter*change"a*ble*ness

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]