BLACKEN is a playable word

blacken Scrabble® Dictionary

verb
blackened, blackening, blackens
to make black
78 Playable Words can be made from "BLACKEN"
   2-Letter Words (12 found)
   3-Letter Words (25 found)
   5-Letter Words (8 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)