Here are some examples of words using "exo-":
* Exocrine: Relating to glands that secrete substances outside the body, such as sweat glands.
* Exophthalmos: Protrusion of the eyeballs.
* Exogenous: Originating outside the body.
* Exoskeleton: A hard external covering that supports and protects an organism.
* Exotropia: A condition in which one or both eyes turn outward.
Remember, combining forms are often used with suffixes to create medical terms.