British English and American English - I, J, K, L

British English	American English
ice lolly	Popsicle (trademark)
icing sugar	powdered sugar, confectioners’ sugar
in hospital	in the hospital
in-built	built-in
indicator (on a car)	turn signal
industrialisation	industrialization
inside leg	inseam
instil	instill
interval	intermission
inverted commas, quotation marks	quotation marks
jacket potato	baked potato
jam	jam, preserves
jelly babies	jelly beans
jewellery	jewelery
Joe Bloggs	Joe Blow, John Doe
Joe Public	John Q. Public
jug	jug, pitcher
juggernaut	18-wheeler
jumble sale	yard sale, rummage sale
jump lead	jumper cable
jumper	sweater
junior school	elementary school
kennel	doghouse
kilometre	kilometer
knickers	panties
labour	labor
ladybird	ladybug
lawyer	attorney
letter box	mail box
level crossing	grade crossing
leveller	leveler
licence	license
lift	elevator
line	queue
lollipop lady (or man)	crossing guard
lolly	Popsicle (trademark)
long-sighted	far-sighted
loo (toilet)	john
loose cover	slipcover
lorry	truck, semi, tractor
lost property	lost and found
loudhailer	bullhorn
low loader	flatbed truck
luch room	dining hall
lucky dip	grab bag
luggage	baggage
luggage van	baggage car
lustre	luster