Just incase you can't be arsed going to the link :-
aluminum * aluminium
analog analogue
anesthesia anaesthesia
archeology archaeology
boro borough "boro" is informal and is sometimes seen in British road markings.
bylaw bye law
catalog catalogue
center centre
color colour
curb kerb Edge of roadway or pavement. "curb" in the sense of "restrain" is used in British and American English.
defense defence
dialog dialogue
donut doughnut "donut" is informal and is quite commonly used in BE to suggest that the bun is of a typical American character.
draft draught
encyclopedia encyclopaedia
favorite favourite
gage gauge + American usage may be obsolescent
gray grey
gynecology gynaecology
hauler haulier
honor honour
humor humour
jewelry jewellery
license licence British usage is license for the verb and licence for the noun
maneuver manoeuvre
meter metre British usage is "meter" for a measuring device and "metre" for the unit of length
mold mould
mustache moustache
nite night "nite" is used informally in both AE and BE.
omelet omelette
pajamas US pyjamas
practice practise British usage is "practise" for the verb and "practice" for the noun
program programme British usage is "program" for computers and "programme" for television or radio.
routing routeing
specialty speciality
story storey of building
sulfur sulphur + According to a correspondent the American spelling is now "official" British spelling for use by professional chemists but it is unlikely to be recognised by any other British English speaker.
thru through + American usage is obsolescent but may still be seen on road signs etc.,
tire tyre part of wheel in contact with road
vise vice tool
I'll start the list:
