Despite the fact that both countries officially speak English, the languages between the two are vast. Do a quick google search and you'll find webpages that go on forever about the different terms and phrases that are used. Since I'm a vegan blogger and I talk about food a lot, I thought I would just run through the differing food terms that I can think of.
(usually sold ground as LSA--Linseed, sunflower, and almond)
(ex. butternut pumpkin, kabocha pumpkin. Only yellow summer squash is called squash)
Therefore, I eat Sultana Bran for breakfast aka brekky
Biscuits or bikkies
Those are the main ones for now. I'll update if I can think of more!
Though, cordial in Australia is this concentrated liquid, rather than a powder. It's also less sweet than American kool aid.
Burger King (ack!)
McDonald's (double ack!)
I'm trying to think of more, but I've been here for long enough now that they are normal, and not something that I think about often. Once in a while someone or something will jog my memory. And Australians make fun of Pommies (British people) who call zucchini "courgette" and eggplant "aubergine".