However, you could use these terms depending on the context:
* Monera: This term was historically used to refer to prokaryotes as a kingdom in the biological classification system. However, it's not widely used anymore.
* Bacteria and Archaea: These are the two main domains of prokaryotes. You could say "bacteria and archaea" instead of "prokaryotes" to be more specific.
* Unicellular organisms without a nucleus: This is a descriptive way to refer to prokaryotes, emphasizing their lack of a nucleus.
The best choice depends on your specific needs and the audience you're talking to.