coal backing

12 LETTERS · STARTS WITH C

coal backing is a valid 12-letter word worth 22 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1A1L1B3A1C3K5I1N1G2

3 + 1 + 1 + 1 + 0 + 3 + 1 + 3 + 5 + 1 + 1 + 2 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does coal backing mean?