plate proof

11 LETTERS · STARTS WITH P

plate proof is a valid 11-letter word worth 17 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3L1A1T1E1P3R1O1O1F4

3 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 4 =17 PTS

DOUBLE WORD → 34TRIPLE WORD → 51

MEANING

What does plate proof mean?