bumper spring

13 LETTERS · STARTS WITH B

bumper spring is a valid 13-letter word worth 21 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3U1M3P3E1R1S1P3R1I1N1G2

3 + 1 + 3 + 3 + 1 + 1 + 0 + 1 + 3 + 1 + 1 + 1 + 2 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does bumper spring mean?