Here are some of the common American and British spellings that cause confusion and errors for students. Please note that in India, we generally tend to use the British spellings, but there is a trend towards the American spellings now. American Spelling
British Spelling
acknowledgment
acknowledgement
catalog
catalogue
check
cheque
color
colour
favor
favour
hemoglobin
haemoglobin
humor
humour
installment
instalment
jewelry
jewellery
judgment
judgement
labor
labour
meter
metre
neighbor
neighbour
pajama
pyjama
parlor
parlour
program
programme
rumor
rumour
theater
theatre