Australia is a country located in the southern hemisphere, made up of mainland Australia, Tasmania, and other smaller islands. The capital city of Australia is CANBERRA, which has 8 letters. Adelaide is the fifth-most populous city in Australia, also with 8 letters. EMU is a large flightless bird native to Australia, with 3 letters. Perth is the capital and largest city of Western Australia, with 5 letters. Sydney is the state capital of New South Wales and the most populous city in Australia, with 6 letters. OPAL is a gemstone found in Australia, with 4 letters. Downunder is a slang term for Australia, with 9 letters. Helen Reddy is an Australian singer-songwriter, with 10 letters. Islandconti is a nickname for Australia, with 11 letters. Sutherlandsmotherland is a nickname for Australia, with 21 letters.