General:
* Automatic: Happening or done without conscious thought or effort.
* Autobiography: A written account of a person's life written by that person.
* Autocracy: Rule by a single person with absolute power.
* Autonomy: The right or condition of self-government.
* Autoimmune: Relating to an immune response that attacks the body's own tissues.
* Automaton: A moving mechanical device that works automatically.
Science and Technology:
* Autoclave: A device that uses high pressure and steam to sterilize equipment.
* Autopsy: A postmortem examination to determine the cause of death.
* Automobile: A self-propelled road vehicle.
* Autograph: A person's own signature.
* Autoignition: The spontaneous ignition of a fuel due to heat.
Other:
* Autodidact: A person who is self-taught.
* Autoeroticism: Sexual arousal or gratification from one's own body.
* Autogenous: Originating or produced within the body.
* Automatic pilot: A system that controls an aircraft or other vehicle automatically.
Prefixes:
* Auto-: A prefix meaning "self" or "by oneself." It is commonly found in technical and scientific terminology.
These are just a few examples, and there are many other words with the Greek root "auto."