WordNet (r) 3.0 (2006):

per se
    adv 1: with respect to its inherent nature; "this statement is
           interesting per se" [syn: intrinsically, per se, as
           such, in and of itself]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "per se":
   alone, apart, at bottom, at heart, at the core, au fond, basically,
   by itself, essentially, fundamentally, in essence, in itself,
   in substance, in the main, in the singular, independently,
   individually, intrinsically, materially, once, one by one,
   particularly, primarily, separately, severally, single-handedly,
   singly, singularly, solely, substantially