Enlighten is a Scrabble word?

Is ENLIGHTEN a scrabble word?

Words with Friends : YES

English International (SOWPODS) : YES

Collins Scrabble Words : YES

Official Tournament & Club Word List : YES

Enable1 Dictionary : YES

Letterpress Dictionary : YES

Definitions for the word 'enlighten'

verb

ENLIGHTEN, make free from confusion or ambiguity; make clear
ENLIGHTEN, give spiritual insight to; in religion
ENLIGHTEN, make understand
ENLIGHTEN, to give knowledge or understanding to (someone) : to explain something to (someone)

Synonyms for 'enlighten'

Words that start with ENLIGHTEN

Words that end with ENLIGHTEN

Words that contain ENLIGHTEN

The word ENLIGHTEN is worth 13 points in Scrabble and 16 points in Words with Friends

How to use the word 'enlighten' in a sentence

I don't understand what's going on; can someone please enlighten me?
the lecturer at the planetarium enlightened us about the latest astronomical discoveries