Travelling or traveling are both correct spellings. I learned that travelling is used in British English, while traveling is common ...

 Judgment or judgement refers to the ability to make decisions, form opinions, or reach a conclusion. Judgment is the standard ...

Flyer and flier are both correct spellings, but flyer is the more widely used form, while flier is especially common ...

Toward and towards have the same meaning: they show movement, direction, or an attitude in relation to something. Toward is ...

Canceling is the usual American English spelling, while cancelling is the standard British English spelling. Both mean the same thing. ...

 Spelt and spelled are both correct past tense and past participle forms of spell. Spelt is more common in British ...

Gray and grey are both correct spellings for the same color; gray is standard in American English, while grey is ...

Cancelled and canceled have the same meaning; cancelled is standard in British English, while canceled is standard in American English. ...

 Cheque and check are two spellings for the same banking term. Cheque is standard in British English, while check is ...

Pyjamas and pajamas are both correct spellings for clothes worn in bed. Pyjamas is mainly British English, while pajamas is ...