There is no other name for Australia. Its full name is the
Commonwealth of Australia. Some confuse the names "Oceania",
"Australasia" and "Australia", but the two former names each
represent a different region, whereas "Australia" is a separate
nation and continent. Informally, it is known as "down under" or
can also be known as "Oz".
Related Q&A：
What is another name of Australia？-Well, you know, another common name for Australia is \Down Under\ That's a pretty popular way to refer to it. It gives this kind of fun and unique image of the country being on the opposite side of the world. People often say \I'm going to the Down Under\ when they mean they're traveling to Australia. It's just one of those cool and casual names that have stuck around and are used quite a bit when we talk about this amazing place. So, yeah, \Down Under\ is another name for Australia! How neat is that?
