wall shot
A strike that was a result of pins coming off the kickback.

washout
1-3-10 split or the 1-2-4-10 split. Others are 1-3-7 and the 1-3-6-7.

weak 7 pin
The 7 pin standing after an ineffective hit.

wire it
Scoring three strikes in the tenth frame.

woolworth
5-10 split.

working ball
A ball with action that mixes the pins on an off-pocket hit and has them scrambling with each other for a strike.