alum rock

9 LETTERS · STARTS WITH A

alum rock is a valid 9-letter word worth 16 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1L1U1M3R1O1C3K5

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

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does alum rock mean?