WordNet (r) 3.0 (2006):

on the whole
    adv 1: with everything considered (and neglecting details);
           "altogether, I'm sorry it happened"; "all in all, it's
           not so bad" [syn: all in all, on the whole,
           altogether, tout ensemble]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "on the whole":
   after all, all in all, all things considered, almost entirely,
   altogether, approximately, as a rule, as a whole,
   as an approximation, at large, before the bench, before the court,
   broadly, broadly speaking, by and large, ceteris paribus, chiefly,
   commonly, considering, effectually, essentially,
   everything being equal, generally, generally speaking, in court,
   in general, in round numbers, in the main, mainly, mostly,
   normally, on balance, on the average, ordinarily, overall,
   predominantly, prevailingly, roughly, roughly speaking, routinely,
   speaking generally, sub judice, substantially, taking into account,
   therefore, this being so, usually, virtually, wherefore