American Spelling

Australian Spelling

aluminum

aluminium

analyze

analyse

authorize

authorise

behavior

behaviour

capitalize

capitalise

catalog

catalogue

center

centre

check

cheque

color

colour

counselor

counsellor

defense

defence

emphasize

emphasise

esthetic

aesthetic

inquiries

enquiries

enrollment

enrolment

insured

ensured

enterprize

enterprise

installment

instalment

favor

favour

fiber

fibre

gray

grey

harbor

harbour

honored

honoured

labeled

labelled

maneuver

manoeuvre

maximize

maximise

medieval

mediaeval

meter

metre

mold

mould

mustache

moustache

odor

odour

organize

organise

program

programme

realization

realisation

recognize

recognise

stylized

stylised

summarize

summarise

theater

theatre

tire

tyre

tonite

tonight

totaled

totalled

traveling

travelling