Cases of word usage

1) one of a series of teeth on the rim of a wheel which transfers motion by locking into the teeth of a smaller wheel (cog)

2) a metal frame on the floor in front of an open fireplace; a guard over the wheel of a vehicle (fender)

3) a heavy wheel which, when spinning fast, keeps steady the objects in which it is fixed (gyroscope)

4) the central part of a wheel from which the spokes radiate (hub)

5) an apparatus used for raising a car off the ground so that a wheel may be changed; a playing-card between 10 and the Queen in value (jack)

6) a bar passed through the end of an axle to keep the wheel in position; a person who keeps a business, organization etc successful (linchpin)

7) an apparatus with a wheel and ropes of chains, used for lifting things (pulley)

8) relating to a ray, rays or a radius; (of spokes in a bicycle wheel etc) arranged like rays or radii (radial)

9) an act of revolving or going round; a complete turn of a wheel etc (revolution)

10) a gambling game in which a ball falls by chance into a numbered hole in a wheel (roulette)