principally

from WordNet (r) 3.0 (2006)

principally
    adv 1: for the most part; "he is mainly interested in
           butterflies" [syn: {chiefly}, {principally}, {primarily},
           {mainly}, {in the main}]

from The Collaborative International Dictionary of English v.0.48

Principally \Prin"ci*pal*ly\, adv.
   In a principal manner; primarily; above all; chiefly; mainly.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

18 Moby Thesaurus words for "principally":
      above all, at bottom, basically, chiefly, especially, essentially,
      first and foremost, fundamentally, in essence, in the main,
      largely, mainly, mostly, on the whole, overall, particularly,
      predominantly, primarily

[email protected]