Synonyms of the word 
ENLIGHTENING → EDIFYING - ILLUMINATING - INFORMATIVE
enlightening
- v. present participle of enlighten.
edifying
- adj. That educates, informs, illuminates or instructs.
- adj. That enlightens or uplifts.
- v. present participle of edify.
illuminating
- adj. Providing illumination or light.
- adj. (figuratively) Providing clarification or explanation; educational, revealing.
- v. present participle of illuminate.
informative
- adj. Providing information; especially, providing useful or interesting information.
- adj. (in standards and specifications) Not specifying requirements, but merely providing information.
If you are interested in words, visit the following sites :
- wiktionary.org/enlightening For complete definition of a word
- 1word.ws/enlightening to play with words, suffixs, prefixs, etc.