There isn't really another name for the bacteria kingdom. The term "bacteria" is generally used to refer to the entire kingdom.

However, you might encounter the term Monera, which was previously used as a kingdom to encompass bacteria and archaea. This classification is no longer widely accepted because archaea are now recognized as a separate domain of life.

So, while there's no official synonym for "bacteria", you might come across "Monera", but it's important to remember that it's an outdated term.