-A-

The AA, the RAC:
   AAA ('Triple A') American Automobile Association.

Abattoir:
    Slaughterhouse

Abseiling:
    Rappeling

Abroad:
    Overseas
("Jon just got back from an overseas tour with the Army")

Accelerator:
    Gas Pedal

'Action Man':
   'G.I. Joe'

Advert (TV):
   Commercial

A&E, Casualty:
    ER (emergency room)

Aerial:
   Antenna

Alsatian:
    German Shepherd (as it should be)

"All Right?" (Greeting):
    'What's up?','How's it Going?'

Amber (on Traffic Lights):
   Yellow

America:
   The States.
Americans only formally refer to their country as 'America,' and usually (commonly) refer to it as 'the States.'

Ante-Natal:
   Pre-Natal

Anti-Clockwise:
   Counter-Clockwise

Articulated Lorry:
    'Semi,' Semi-Tractor Trailer, 'Big Rig,' '18-Wheeler'

Arse:
   Ass

Aubergine:
    Eggplant

Autumn:
    Fall

-B-

Back Bacon:
   Canadian Bacon

Balaclava:
    Ski Mask

Bank of England, the Exchequer:
    Department of the Treasury

Bank Holiday:
    National Holiday

Bap, Cob (for beefburgers):
    Hamburger Bun

Barrister:
    Trial Lawyer

Beefburger:
    Hamburger
("I'll have a hamburger, fries and a Mountain Dew to go")

Benefits:
    Welfare

Bespoke:
    Tailor-Made

Big Wheel:
    Ferris Wheel

Bin:
    Wastebasket, Garbage can, Trash can

Bin Liner:
    Garbage, Trash bag

Biscuit Barrel:
   Cookie Jar

Biscuits:
   Cookies

Blancmange:
    Pudding

Bleeper:
   Beeper

Bloke, Chap, Lad:
    Man, Guy

Boiled Sweets:
    Hard Candy

Bonnet:
    Hood

Booking:
    Reservation

Boot:
    Trunk

Bowler Hat:
    Derby Hat

Braces:
    Suspenders

Break (school):
   Recess

British Rail:
    Amtrak
(although the use of trains in America is not a common way of getting around)

Brook, Stream:
   Creek, Stream

Box (men's athletic protection):
   Cup
(waistband supporter that holds the cup is called a 'jockstrap')

Builder:
   Contractor

Building Society:
    Savings & Loan

Bum Bag:
    Fanny pack

Bungalow:
    Single-Storey House

Bum, Bottom
   Butt, Booty, Hiney, Fanny

-C-

Call-Box:
    Phone Booth

Candy Floss:
   Cotton Candy

Canoe:
    Kayak

Car Park:
    Parking Lot

Canteen:
   Cafeteria

Caravan:
   Trailer, Camper
("We're taking the camper and going to the Grand Canyon on our vacation next week")

Caretaker, Cleaner:
    Janitor

Car Boot Sale:
    Yard / Garage Sale

Car Sticker:
   Bumper Sticker

(Car) Side Lights:
   Parking lights

(Car) Wing:
   Fender

Cash Point, 'Hole in the wall':
   ATM (automatic teller machine)

Catapult:
    Sling-Shot

Cellar:
   Basement

Chemist:
   Pharmacy

Chips:
    French Fries

Chip Butty:
    Unheard of!

Christen:
    Baptize
("Randy, should we invite friends and family to little Zack's Baptism, or just the close family?")

Cinema:
    Movie Theatre, Cinema

City Centre:
   Downtown

Clean (your teeth):
   Brush

Coach:
   Bus
The American equivalents to National Express are: Greyhound and Trailways.

Consultant Doctor:
    Specialist

Cooker, Oven:
    Oven, Stove

Cotton ("needle & cotton"):
    Thread

Cotton Wool:
   Cotton Balls

Courgette:
    Zucchini

Crate (e.g. Crate of Beer):
   Case

Crisps:
    Potato Chips

Crutch:
    Crotch

Cul-de-Sac:
   Dead End

Current Account:
   Checking Account

Curriculum Vitae:
   Résumé