penstock /penˈstok/

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

• capsulary
• capsulate
• capsule
• capsules
• capsulise
• capsulised
• capsulises
• capsulising
• capsulize
• capsulized
• capsulizes
• capsulizing
• Capt.
• captain
• captaincies
• Captain Cooker
• captaincy
• captained
• captain-general
• captaining
• captain of industry
• captainries
• captainry
• captains
• captain's biscuit