Common Words:
* pre-approve
* pre-existing
* pre-med
* pre-paid
* pre-school
* pre-teen
* pre-flight
* pre-mature
* pre-historic
* pre-order
* pre-pay
Less Common Words:
* preamble
* precept
* precarious
* precede
* precipice
* precious
* precise
* preclude
* precocious
* precursor
* predatory
* predetermine
* preeminent
* preface
* prefer
* pregnancy
* prejudice
* prelude
* premiere
* premise
* premium
* premonition
* preoccupation
* preposterous
* prescribe
* presence
* present
* preserve
* president
* press
* presume
* pretend
* prevail
* preview
* previous
* primacy
* primary
* prime
* primitive
* prince
* princess
* principal
* principle
* prior
* priority
* prism
* prison
* private
* privilege
* pro
This is just a small selection - there are many more words that start with "pre"! Let me know if you're looking for words with a specific meaning, or words that are related to a particular topic.