What is an homonym for rest?

There isn't a perfect homonym for "rest" in the sense of a complete synonym that is spelled and pronounced the same.

However, depending on the context, you could consider:

* Wrest: This word is a homophone for "rest," meaning to take something by force. It might work in some contexts like, "She wrested control of the company from her father."

* Rests: This is the plural form of "rest," but it can be used as a noun in certain situations. For example, "The musical rests created a pause in the melody."

Ultimately, the best alternative will depend on the specific meaning you want to convey.