Cavia is a genus of rodents commonly known as guinea pigs. While the term "cavia" is often used to refer to these furry creatures, there are a few other synonyms that can also be used. For instance, "cavy" is a shortened version of the term, and is sometimes preferred due to its brevity. "Guinea pig" is another synonym that is widely used, and may be preferable for those who are not familiar with scientific names. Other synonyms for cavia include "domesticated rodent" and "small pet." Regardless of which term you use, these adorable animals are sure to bring joy and companionship.