General:
* American: apartment British: flat
* American: gasoline British: petrol
* American: candy British: sweets
* American: truck British: lorry
* American: fall (season) British: autumn
* American: sidewalk British: pavement
* American: trash can British: bin
* American: cell phone British: mobile phone
* American: cookie British: biscuit
* American: sneakers British: trainers
Food:
* American: chips British: crisps
* American: french fries British: chips
* American: pop British: fizzy drink
* American: jelly British: jam
* American: zucchini British: courgette
Other:
* American: gotten British: got
* American: gotten British: got
* American: mom British: mum
* American: vacation British: holiday
* American: bathroom British: toilet
* American: check British: queue
This is just a small sample, and there are many other differences in vocabulary between British and American English. It's worth noting that regional variations within the UK can also exist.