Per*mut"a*ble*ness

from The Collaborative International Dictionary of English v.0.48

Permutable \Per*mut"a*ble\ (p[~e]r*m[=u]"t[.a]*b'l), a. [Cf. F.
   permutable.]
   Capable of being permuted; exchangeable. --
   {Per*mut"a*ble*ness}, n. -- {Per*mut"a*bly}, adv.
   [1913 Webster]