Machine and Pulley block

Machine noun - A device that changes energy into mechanical motion.

Pulley block and machine are semantically related. In some cases you can replace phrase "Pulley block" with "Machine", this terms are similar.

Nearby Words: machination, machinery, machined, machinist, machinated

Pulley block noun - A simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope.

Machine and pulley block are semantically related. You can use "Machine" instead a noun phrase "Pulley block".