thruster

noun

1. One who thrusts, who pushes or stabs.

   “Nevertheless osteopaths are coming to regard themselves not so much as thrusters, or even as repositioners, of bones, but as releasers of the patient's own recuperative forces.”

2. A device for propelling an object, especially a spacecraft or a ship (marine vessel).
3. A bow thruster or a stern thruster.
4. A surfboard (usually a shortboard) with three fins of approximately equal size, one centred at the back, one on each side about 25cm forward and out near the rails.
5. An ambitious, driven person; a go-getter.

   “The executive is a thruster with ideas to expand or improve the business and his superiors fail to react—for whatever reason—and do not give acceptable explanations.”

   “His hi-spec gear suggests that he's a corporate high-flyer and he's definitely a bit of a thruster, very much in control, taking care of business.”