penstock /penˈstok/

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

• radiotelemeters
• radiotelephone
• radiotelephones
• radiotelephony
• radio telescope
• radio telescopes
• radioteletype
• radioteletypes
• radiotherapeutics
• radiotherapist
• radiotherapists
• radiotherapy
• radiothon
• radiothons
• radio-thorium
• radiotoxic
• radio wave
• radio waves
• radish
• radishes
• radium
• radium A
• radium B
• radium bomb
• radium bombs