Here ya go - here is something I made for another site once - took me bloody ages!
AMERICAN - ENGLISH
adhesive bandage - plaster
aluminum - aluminium
anesthesiologist - anaesthetist
antsy - fidgety
ATM - cashpoint machine
apartment/condo - flat
assignment - homework
back yard - garden
backpack - rucksack
baking soda - bicarb of soda
Band Aid - plaster again
bangs - fringe
barette - hair clip (?)
bathroom - loo or bog
bathtub - bath
bell pepper - green pepper
billfold - wallet
billion (thousand million) - billion (million million)
birthed - gave birth or bore
biscuits - scones (kinda)
broil - grill
bug - insect or to annoy someone
bum (hobo) - tramp
caboose - guard's van
call collect - reverse charges
call - phone or ring someone
can (of food) - tin
candied cherries - glac? cherries
candy - sweets
car (on train) - carriage
cavity - tooth decay
cheap - second-rate or crap
check (banker's) - cheque or bill
check (correct) - tick
checkers - draughts
chips - crisps
closet - wardrobe
club - truncheon (police)
Clue (game) - Cluedo
comforter - quilt or duvet
commercials (TV) - adverts
conductor (train) - guard
cookie - biscuit
cookie tray - baking sheet
cornstarch - cornflour
cream of wheat - semolina (YUK!)
cupcakes - iced fairy cakes
dead-end