1. Pedal: To move a bicycle or other vehicle using your feet.
2. Pedestrian: A person who walks, especially in a town or city.
3. Biped: A two-legged animal.
4. Quadruped: A four-legged animal.
5. Pedometer: A device that measures the number of steps you take.
6. Impediment: Something that hinders or obstructs. (This is a bit of a tricky one, as "ped" here refers to "foot" in the sense of "stopping" something in its tracks.)
7. Expediate: To speed up a process. (Another tricky one, "ped" is related to "foot" in the sense of "moving quickly".)
8. Pedestal: A base or support for a statue or other object.
9. Podiatrist: A doctor who specializes in the care of feet.
10. Pedantic: Characterized by a meticulous or overly scholarly approach, often in a way that is considered tiresome or pretentious. (This one is a little more abstract, but "ped" comes from the Greek word "pais," meaning "child" and "ped" was used to denote "learning" or "education," which is where the pedantic sense comes from.)