The Collaborative International Dictionary of English v.0.48:

Antipodes \An*tip"o*des\, n. [L. pl., fr. Gr. ? with the feet
   opposite, pl. ? ?; 'anti` against + ?, ?, foot.]
   1. Those who live on the side of the globe diametrically
      opposite.
      [1913 Webster]

   2. The country of those who live on the opposite side of the
      globe. --Latham.
      [1913 Webster]

   3. Anything exactly opposite or contrary.
      [1913 Webster]

            Can there be a greater contrariety unto Christ's
            judgment, a more perfect antipodes to all that hath
            hitherto been gospel?                 --Hammond.
      [1913 Webster]

WordNet (r) 3.0 (2006):

antipodes
    n 1: any two places or regions on diametrically opposite sides
         of the Earth; "the North Pole and the South Pole are
         antipodes"

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "Antipodes":
   Africa, America, Asia, Asia Major, Asia Minor, Australasia, East,
   Eastern Hemisphere, Eurasia, Europe, Far East, Levant, Middle East,
   Near East, New World, Occident, Oceania, Old World, Orient, West,
   Western Hemisphere, continent, down under, eastland, landmass,
   the old country



Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "antipodes":
   China, Darkest Africa, God knows where, Greenland, North Pole,
   Outer Mongolia, Pago Pago, Pillars of Hercules, Siberia,
   South Pole, Thule, Tierra del Fuego, Timbuktu, Ultima Thule, Yukon,
   antipodal points, antipode, antipoints, antipole, antipoles,
   antithesis, antonym, black and white, contra, contraposita,
   contrapositives, contraries, converse, counter, counterbalance,
   countercheck, counterpoint, counterpoise, counterpole,
   counterpoles, counterterm, foil, frontier, godforsaken place,
   inverse, jumping-off place, night and day, nowhere, obverse,
   offset, opposite, opposite number, opposite poles, opposites,
   outback, outer space, outpost, outskirts, polar opposites, pole,
   poles, reverse, setoff, the Great Divide, the South Seas,
   the boondocks, the contrary, the moon, the other side, the sticks,
   the tullies, vis-a-vis