Prefixes:
* Uncover: to reveal something that was hidden
* Overcover: (informal) to be too disguised, to be in too deep
* Undercover: to operate secretly or disguised
* Re-cover: to cover again, especially with new material
* Miscover: (archaic) to discover by accident
Suffixes:
* Coverlet: a bedspread
* Covering: something that covers something else
* Coverage: the extent to which something is covered
* Coverup: an attempt to hide something wrong
Compound Words:
* Book cover: the outside of a book
* Cover charge: a fee to enter a club or venue
* Cover story: a false story to conceal a true one
* Cover letter: a letter accompanying a resume
Other:
* Covered: past participle of "cover"
* Covers: a plural of "cover" (e.g., "The band played several covers.")
This is not an exhaustive list, but it provides a good range of examples showcasing the various ways the base word "cover" can be used to create new words.