Informal:
* Bacteria: While not entirely accurate (as Archaea are also prokaryotes), "bacteria" is often used colloquially.
* Microbials: This term encompasses both prokaryotes and some eukaryotes like fungi.
* Single-celled organisms: This is broad, but technically accurate as all prokaryotes are single-celled.
More formal:
* Monera: An older classification that included all prokaryotes.
* Acellular organisms: This emphasizes the lack of a nucleus and other membrane-bound organelles.
* Pre-nuclear organisms: This highlights their evolutionary status before the development of a nucleus.
The best alternative depends on the specific context and the level of formality needed.
