The Collaborative International Dictionary of English v.0.48:

Geographic \Ge`o*graph"ic\, Geographical \Ge`o*graph"ic*al\, a.
   [L. geographicus, Gr. ?: cf. F. g['e]ographique.]
   Of or pertaining to geography.
   [1913 Webster]

   Geographical distribution. See under Distribution.

   Geographic latitude (of a place), the angle included
      between a line perpendicular or normal to the level
      surface of water at rest at the place, and the plane of
      the equator; differing slightly from the geocentric
      latitude by reason of the difference between the earth's
      figure and a true sphere.

   Geographical mile. See under Mile.

   Geographical variation, any variation of a species which is
      dependent on climate or other geographical conditions.
      [1913 Webster]

WordNet (r) 3.0 (2006):

geographical
    adj 1: of or relating to the science of geography [syn:
           geographic, geographical]
    2: determined by geography; "the north and south geographic
       poles" [syn: geographic, geographical] [ant: magnetic]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "geographical":
   areal, cartographic, chorographic, geodesic, geodetic, geographic,
   geological, geophysical, locational, navigational, physiographic,
   positional, regional, sectional, situal, situational, territorial,
   topographic, zonal