The Murrumbidgee River is the longest river in Australia, spanning 12 letters. The Ord River is a short river located in the Kimberley region of Western Australia, with 3 letters. The Murray River is the longest river in Australia and flows through New South Wales, Victoria, and South Australia, with 6 letters. The DARLING River is the third longest river in Australia, located in New South Wales, with 7 letters. The Barcoo River is a tributary of the Cooper Creek in Queensland, with 6 letters. The Yarra River is a major river in Victoria, with 5 letters. The AVON River is located in Western Australia, with 4 letters. The SNOWY River is located in New South Wales and Victoria, with 5 letters. The FLINDERS River is the longest river in Queensland, with 8 letters.