What is the Australian word for backpacking or hiking?

There isn't a single, distinct Australian word for backpacking or hiking. Australians generally use the same terms as other English speakers:

* Backpacking: This is the most common term, especially when referring to longer, multi-day trips with a backpack.

* Hiking: This term is used for shorter, day walks in the bush or mountains.

* Bushwalking: This term is sometimes used, particularly in Australia, to emphasize walking in the Australian bush or wilderness.

You might also hear more informal terms like:

* Walking

* Trekking

* Rambling

So, while there's no unique Australian word for backpacking or hiking, "bushwalking" is a good option if you want to emphasize the Australian context.