WordNet (r) 3.0 (2006):

on the other hand
    adv 1: (contrastive) from another point of view; "on the other
           hand, she is too ambitious for her own good"; "then
           again, she might not go" [syn: on the other hand, then
           again, but then] [ant: on one hand, on the one
           hand]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "on the other hand":
   a rebours, after all, again, against the grain, albeit, alias,
   all the same, although, arsy-varsy, aside, askance, askant,
   asquint, at all events, at any rate, broadside, broadside on, but,
   by contraries, contra, contrarily, contrariously, contrariwise,
   conversely, crabwise, edgeway, edgeways, edgewise, else, elsewise,
   even, even so, for all that, glancingly, howbeit, however,
   in any case, in any event, in flat opposition, in other respects,
   in other ways, inversely, just the opposite, just the same,
   laterad, laterally, nay rather, nevertheless, nonetheless,
   notwithstanding, on its side, on the beam, on the contrary,
   oppositely, or else, other than, otherwise, per contra,
   quite the contrary, rather, right and left, sideling, sidelong,
   sideward, sidewards, sideway, sideways, sidewise, sidling, still,
   than, though, to the contrary, topsy-turvy, tout au contraire,
   upside down, vice versa, when, yet