From the Latin "vertere" (to turn):
* Convert: To change from one form or state to another.
* Revert: To return to a former state or condition.
* Divert: To turn aside from a course or direction.
* Avert: To prevent something from happening.
* Invert: To turn upside down or inside out.
* Subvert: To undermine or overthrow.
* Pervert: To twist or distort from its original meaning or purpose.
* Vertebrate: An animal with a backbone.
Other words:
* Vertigo: A sensation of dizziness.
* Vertical: Upright or perpendicular to the horizon.
* Vertex: The highest point or summit.
* Intervert: To turn inward or toward oneself.
* Extrovert: A person who is outgoing and socially confident.
Note: The spelling of the root word can vary slightly, like "vert" or "vers."