mass book

9 LETTERS · STARTS WITH M

mass book is a valid 9-letter word worth 16 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3A1S1S1B3O1O1K5

3 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 5 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does mass book mean?