unreturnable

from Moby Thesaurus II by Grady Ward, 1.0
33 Moby Thesaurus words for "unreturnable":
      changeless, constant, immutable, incommutable, inconvertible,
      indefeasible, inert, insusceptible of change, intransmutable,
      invariable, irretrievable, irreversible, irrevocable, lasting,
      noble, nonreturnable, nonreversible, permanent, reverseless,
      unalterable, unalterative, unaltered, unchangeable, unchanged,
      unchanging, undeflectable, undeviating, unmodifiable, unremitting,
      unrestorable, unsusceptible, unvariable, unvarying