sunk key

8 LETTERS · STARTS WITH S

sunk key is a valid 8-letter word worth 18 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1U1N1K5K5E1Y4
1 + 1 + 1 + 5 + 0 + 5 + 1 + 4 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does sunk key mean?

1