"Butler" is a noun, meaning a male domestic servant who is in charge of the wine cellar, serving food, and managing other household staff.
If you're looking for a verb related to the duties of a butler, you could use terms like:
* Serve: to provide food or drink.
* Manage: to control or oversee.
* Attend: to be present and provide service.
* Organize: to arrange or put in order.