Synonyms for Enlightened (same or very similar meaning)
WordNet sense 1 (people who have been introduced to the mysteries of some field or activity):
initiate, initiate
WordNet sense 2 (freed from illusion):
disillusioned
WordNet sense 3 (freed from enchantment):
disenchanted
WordNet sense 4 (highly educated; having extensive information or understanding):
knowing, knowledgeable, learned, lettered, well-read, well-educated, learned
WordNet sense 5 (possessing an education (especially having more than average knowledge)):
educated
From the ODE community, based on WordNet
add/edit