COALSACK is a playable word

coalsack Scrabble® Dictionary

noun
pl. coalsacks
a dark region of the Milky Way
88 Playable Words can be made from "COALSACK"
   2-Letter Words (9 found)
   3-Letter Words (21 found)
   6-Letter Words (7 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)