Prehumans are a term used to describe the various species of extinct hominids that existed before the emergence of anatomically modern humans. However, there are many other words that can be used as synonyms for prehumans. For example, the term "ancestral hominids" refers to those prehuman species that are closer to the common ancestor of humans and apes, while "early hominids" and "primitive humans" are also commonly used. Additionally, terms such as "non-human primates," "proto-humans," and "prehistoric hominids" can also be used as synonyms for prehumans. These terms help to provide a better understanding of the evolutionary history of humans and our closest relatives.