penstock /penˈstok/

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

• rinked
• rinkhals
• rinkhalses
• rinking
• rink polo
• rinks
• rinky-dink
• rinky-dinks
• rinning
• rins
• rinsable
• rinse
• rinseable
• rinsed
• rinser
• rinsers
• rinses
• rinsible
• rinsing
• rinsings
• rinthereout
• rinthereouts
• Rioja
• Riojas
• riot