The most noticeable difference between American and British English is vocabulary. There are hundreds of everyday words that are different.

In British English we say:
Biscuit
In American English we say:
Cookie

In British English we say:
Car park
In American English we say:
Parking lot

In British English we say:
High street
In American English we say:
Main street

In British English we say:
Post
In American English we say:
Mail

In British English we say:
Lift
In American English we say:
Elevator

In British English we say:
Chips
In American English we say:
Fries

In British English we say:
Bonnet
In American English we say:
Hood

In British English we say:
Football
In American English we say:
Soccer

In British English we say:
Rubber
In American English we say:
Eraser

In British English we say:
Aubergine
In American English we say:
Eggplant

In British English we say:
Dummy
In American English we say:
Pacifier

In British English we say:
Chemist
In American English we say:
Drugstore

In British English we say:
Nappy
In American English we say:
Diaper

In British English we say:
The cinema
In American English we say:
The movies

In British English we say:
Jacket potato
In American English we say:
Baked potato

In British English we say:
Crisps
In American English we say:
Chips

In British English we say:
Flat
In American English we say:
Apartment

In British English we say:
Courgette
In American English we say:
Zucchini

In British English we say:
Holiday
In American English we say:
Vacation

In British English we say:
Waistcoat
In American English we say:
Vest

In British English we say:
University
In American English we say:
College

In British English we say:
Telly
In American English we say:
TV

In British English we say:
Lorry
In American English we say:
Truck

In British English we say:
Loo
In American English we say:
Restroom

In British English we say:
Takeaway
In American English we say:
Takeout

In British English we say:
Jumper
In American English we say:
Sweater

In British English we say:
Braces
In American English we say:
Suspenders

In British English we say:
Underground
In American English we say:
Subway

In British English we say:
Runner beans
In American English we say:
String beans

In British English we say:
Timetable
In American English we say:
Schedule

In British English we say:
Trainers
In American English we say:
Sneakers

In British English we say:
Queue
In American English we say:
Line

In British English we say:
Plaster
In American English we say:
Band-aid

In British English we say:
Phone box
In American English we say:
Phone booth

In British English we say:
Postbox
In American English we say:
Mailbox