So even though Americans and British folks speak English (this happens in different parts of the USA, too), there are clearly a number of words spoken that lead to a number of misunderstandings thanks to the different influences and what not. You can learn a bit about that from this video on vegetable names from Anglophenia:
In an effort to help myself and my friends translate the other side of the pond, I decided to put together this admittedly less than comprehensive spreadsheet:
Feel free to suggest additions in the comments.