Other words used include:
* Toilet (used widely, though not quite as common as "dunny" in informal settings)
* Bog (slightly slangy, often used by older generations)
* Crapper (informal and considered rude in some circles)
* Lavatory (formal and rarely used in everyday speech)
It's worth noting that while "loo" is sometimes used in Australia, it's not as common as in other English-speaking countries.