mainspring

NOUN /meɪn,sprɪŋ/
10 LETTERS · 2 SYLLABLES · STARTS WITH M

mainspring is a valid 10-letter word worth 15 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3A1I1N1S1P3R1I1N1G2
3 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 2 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does mainspring mean?

NOUN · 1 SENSE
1

The most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism.

BROADER