What is a homonym for chest?

The most common homonym for "chest" is "chest" itself. This is because it has multiple meanings:

* The part of the body: "He felt a pain in his chest."

* A box: "She opened the treasure chest."

If you're looking for a word that sounds the same but has a different meaning, there isn't one that is directly related to the meaning of "chest". However, you could use "jest" (meaning joke or a playful remark) as a homophone.