How do you make buzz a plural noun?

"Buzz" is already a plural noun! It refers to multiple instances of a buzzing sound.

Here are some examples:

* "We heard the buzz of bees in the garden."

* "The excited buzz of the crowd filled the stadium."

* "The constant buzz of the city never seemed to stop."

If you want to refer to a single instance of buzzing, you would use "buzz" as a singular noun. For example:

* "I heard a single buzz from the phone."

Let me know if you have any other questions!