Here are some examples:
Pos:
* Position: The act of placing or the place something is located.
* Compose: To put together, create, or arrange.
* Depose: To remove from a position of power.
* Impose: To force something on someone.
* Exposé: A public revelation, often of something scandalous.
Pon:
* Opponent: Someone who is against something or someone else.
* Exponent: Someone who represents or promotes a particular idea.
* Component: A part or element of something.
* Interpone: To place between two things.
* Proponent: Someone who advocates for something.
Note: While both "pos" and "pon" come from the same Latin root, they are not interchangeable. They have slightly different meanings and are used in different contexts.