General Synonyms:
* Inform
* Educate
* Teach
* Instruct
* Explain
* Clarify
* Illuminate
* Elucidate
* Show
* Reveal
Synonyms emphasizing understanding:
* Comprehend
* Grasp
* Perceive
* Understand
* Realize
Synonyms emphasizing wisdom or insight:
* Inspire
* Awaken
* Guide
* Lead
* Indoctrinate
* Convert (can be used for religious contexts)
Synonyms emphasizing a positive change:
* Transform
* Open the eyes of
* Empower
* Liberate
* Emancipate
The best synonym for "enlighten" will depend on the specific context and the desired nuance.