WBifocals
WCapacitor
WCarbonated water
WCelsius
WCoffeemaker
WElectric battery
WFire extinguisher
WGuillotine
WHot air balloon
WLeyden jar
WPyrometer
WShaker broom vise
WShaker-style pantry box
WSpinning jenny
WSteam engine
WThreshing machine
WVaccine