WordNet (r) 3.0 (2006):

wise man
    n 1: a wise and trusted guide and advisor [syn: mentor, wise
         man]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "wise man":
   Brahmin, brain, brainworker, consciousness, egghead, head,
   highbrow, intellect, intellectual, intellectualist, intelligence,
   literate, mandarin, mentality, savant, scholar, thinker,
   white-collar intellectual