penstock /penˈstok/

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

• frequents
• frescade
• frescades
• fresco
• frescoed
• frescoer
• frescoers
• frescoes
• frescoing
• frescoings
• frescoist
• frescoists
• frescos
• fresh
• fresh as a daisy
• fresh as paint
• fresh blood
• fresh-blown
• fresh breeze
• fresh breezes
• freshed
• freshen
• freshened
• freshener
• fresheners