Here are some examples of words that contain the root word "pleo":
* Plethora: an excess or abundance of something
* Pleomorphic: having more than one shape or form
* Pleurisy: inflammation of the pleura, the membranes that surround the lungs
* Pleopod: an abdominal appendage of crustaceans, used for swimming
* Pleochroic: exhibiting different colors when viewed from different directions
It's important to note that while "pleo" often relates to quantity or fullness, its meaning can be more nuanced depending on the specific word.