What is the domain for bunny?

The word "bunny" doesn't have a specific domain in the same way that a website or an email address does. It's a common word with many different uses:

* Animal: It's a colloquial term for a rabbit, especially a young one.

* Slang: It can be used as a term of endearment.

* Nickname: It can be used as a nickname for someone.

If you're looking for a specific meaning or context, please provide more information about what you're looking for.