penstock /penˈstok/

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

• nuncupations
• nuncupative
• nuncupatory
• nundinal
• nundine
• nundines
• nunhood
• nunhoods
• nunnation
• nunnations
• nunneries
• nunnery
• nunnish
• nunnishness
• nunnishnesses
• nuns
• nun's-fiddle
• nun's-flesh
• nunship
• nunships
• Nuns of the Visitation
• nun's-veiling
• nuoc mam
• Nupe
• Nupes