WordNet (r) 3.0 (2006):

for all practical purposes
    adv 1: in every practical sense; "to all intents and purposes
           the case is closed"; "the rest are for all practical
           purposes useless" [syn: for all practical purposes, to
           all intents and purposes, for all intents and
           purposes]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "for all practical purposes":
   all in all, almost entirely, approximately, approximatively,
   by and large, chiefly, effectually, essentially,
   for practical purposes, generally, generally speaking,
   in round numbers, in the main, mainly, more or less, mostly,
   on balance, on the whole, practically, roughly, roughly speaking,
   roundly, say, substantially, virtually