Here are some examples of words with the root "mono":
* Monotone: A single tone or pitch, lacking variation.
* Monopoly: Exclusive control of a commodity or service.
* Monorail: A railway with a single rail.
* Monotheism: Belief in a single God.
* Mononucleosis: A disease caused by a single type of virus.
The prefix "mono" is often used to indicate a single unit, instance, or element.