The term 'OUTBACK BOUNDER' is a combination of two words, 'OUTBACK' and 'BOUNDER'. OUTBACK is an Australian term for the remote, rural areas of the country, while BOUNDER is a term for a person who is adventurous and daring. The crossword solutions for this term are ROO (3 letters) and KANGAROO (8 letters). Roo is a shortened version of KANGAROO, which is a marsupial native to Australia. Kangaroos are well-known for their ability to bound across the OUTBACK with great speed and agility.