penstock /penˈstok/

1. A sluice
2. (in a hydroelectric or other plant) a valve-controlled water conduit

• yapsters
• yaqona
• yaqonas
• YAR
• Yarborough
• yard
• yardage
• yardages
• yardang
• yardangs
• yardarm
• yardarms
• yardbird
• yardbirds
• yarded
• Yardie
• Yardie squad
• yarding
• zebrinny
• zebroid
• zebrula
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• zebrule
• zebrules
• zebu