valve key

9 LETTERS · STARTS WITH V

valve key is a valid 9-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

V4A1L1V4E1K5E1Y4

4 + 1 + 1 + 4 + 1 + 0 + 5 + 1 + 4 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does valve key mean?