* Mechanism: The parts of a machine that work together to produce a particular effect.
* Mechanical: Relating to machinery or mechanics.
* Mechanics: The branch of physics that deals with the motion of objects and the forces that cause them to move.
* Technician: A person skilled in a particular technical field, such as mechanics.
* Mechatronics: The combination of mechanical engineering, electrical engineering, and computer science.
The root "mech" can also appear in less common words:
* Mechina: A type of loom.
* Mecha: A giant robot, particularly in Japanese anime and manga.
These are just a few examples, and there are many other words that contain the root "mech."