The Collaborative International Dictionary of English v.0.48:

Identically \I*den"tic*al*ly\, adv.
   In an identical manner; with respect to identity.
   "Identically the same." --Bp. Warburton. "Identically
   different." --Ross.
   [1913 Webster]

WordNet (r) 3.0 (2006):

identically
    adv 1: with complete identity; in an identical manner; "he is
           fitted with an identically similar one"

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "identically":
   ad eundem, alike, as, as is, as well, ceteris paribus, coequally,
   coextensively, coincidentally, congruently, correspondently,
   correspondingly, coterminously, ditto, either, equally,
   equivalently, evenly, ibid, ibidem, in kind, in like manner,
   in that way, indifferently, just the same, like, like that,
   like this, likewise, proportionately, same here, similarly, so,
   synonymously, the same way, thus, without distinction