penstock /penˈstok/

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

• huswife
• hut
• hutch
• hutched
• hutches
• hutching
• Hutchinsonian
• hut-circle
• hut-circles
• hutia
• hutias
• hutment
• hutments
• huts
• hutted
• hutting
• huttings
• Huttonian
• Hutu
• hutzpah
• hutzpahs
• huzoor
• huzoors
• huzza
• huzza'd