WordNet (r) 3.0 (2006):

satori
    n 1: (Zen Buddhism) a state of sudden spiritual enlightenment

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "satori":
   a priori knowledge, anticipation, ataraxia, ataraxy, buddhi,
   calmness, clairvoyance, composure, contemplation,
   direct apprehension, immediate cognition, imperturbability,
   insight, inspiration, intuition, intuitionism, intuitive reason,
   intuitiveness, intuitivism, knowledge without thought,
   lucid stillness, marmoreal repose, nirvana, peace, peacefulness,
   placidity, placidness, precognition, quiescence, quiescency, quiet,
   quietism, quietness, quietude, repose, rest, restfulness,
   second sight, second-sightedness, serenity, silence, silken repose,
   sixth sense, sleep, slumber, stillness, subconscious knowledge,
   subconscious perception, tranquillity, unmediated perception,
   wise passiveness