Synonyms for Enlighten (same or very similar meaning)
WordNet sense 1 (make understand):
edifyWordNet sense 2 (give spiritual insight to; in religion):
irradiateWordNet sense 3 (make free from confusion or ambiguity; make clear):
clear, crystallize, elucidate, illuminate, crystalise, crystalize, crystallise, clear up, straighten out, shed light on, sort outFrom the ODE community, based on WordNetadd/edit