The Collaborative International Dictionary of English v.0.48:

Nevertheless \Nev`er*the*less"\, adv. & conj. [Never + the (see
   The by that) + less.]
   Not the less; notwithstanding; in spite of that; yet.
   [1913 Webster]

         No chastening for the present seemeth to be joyous, but
         grievous; nevertheless, afterward it yieldeth the
         peaceable fruit of righteousness.        --Heb. xii.
                                                  11.
   [1913 Webster]

   Syn: However; at least; yet; still. See However.
        [1913 Webster]

WordNet (r) 3.0 (2006):

nevertheless
    adv 1: despite anything to the contrary (usually following a
           concession); "although I'm a little afraid, however I'd
           like to try it"; "while we disliked each other,
           nevertheless we agreed"; "he was a stern yet fair
           master"; "granted that it is dangerous, all the same I
           still want to go" [syn: however, nevertheless,
           withal, still, yet, all the same, even so,
           nonetheless, notwithstanding]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "nevertheless":
   after all, again, albeit, all the same, although, anyhow, anyway,
   anywise, at all, at all events, at any rate, but, by any means,
   even, even so, for all that, howbeit, however, in any case,
   in any event, in any way, irregardless, just the same, nohow,
   nonetheless, notwithstanding, rather, regardless, still, though,
   when, yet