The Collaborative International Dictionary of English v.0.48:

Permanently \Per"ma*nent*ly\, adv.
   In a permanent manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

permanently
    adv 1: for a long time without essential change; "he is
           permanently disabled" [syn: permanently, for good]
           [ant: temporarily]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "permanently":
   abidingly, ad infinitum, always, ceaselessly, changelessly,
   constantly, continually, continuously, endlessly, enduringly,
   eternally, everlastingly, for good, forever, forevermore,
   in perpetuity, incessantly, indestructibly, infinitely, inflexibly,
   interminably, invariably, lastingly, never-endingly, perdurably,
   perennially, perpetually, rigidly, statically, steadfastly,
   steadily, time without end, unceasingly, unchangingly, unendingly,
   unwaveringly, without end, world without end