propellˈent adjective

Driving

1. A driving agent
2. A motive

propellˈer noun

1. Someone who, or something which, propels
2. A driving mechanism
3. A shaft with spiral blades (screw-propeller) for driving a ship, aeroplane, etc
4. A steamer with a screw-propeller
5. A helical device for blowing air (air-propeller, propeller fan)
6. An artificial bait which spins (angling)

propelˈment noun

1. Propulsion
2. A propelling mechanism

propellˈer-blade noun

propellˈer-head noun (slang)

An obsessively studious or technologically-minded person

propeller shaft noun

1. The shaft of a propeller
2. The driving shaft between the gearbox and the rear axle in a motor vehicle (also prop shaft)

propelling pencil noun

A pencil with a replaceable lead held in a casing that can be turned to push the lead forward as it is worn down