Are the terms favour and favor interchangeable ? Or is there a slight difference perhaps? This is nitpicking but just curious.

http://www.merriam-webster.com/info/spelling-reform.htm there are other words like this : defence and defense . Why do we have different American and British versions? How did they come to existence? What purpose do they serve?

  • 2
    Favour is the regular spelling. It's favor in the US. Jan 17 '14 at 17:58
  • "Regular spelling"? From my vantage point, it's the other way around.
    – phenry
    Jan 17 '14 at 18:03
  • 1
    You can thank Noah Webster for that. Jan 17 '14 at 18:09
  • 1
    ELU does not underline anything: I would guess your browser, being set to English, thinks the American word a misspelling. Jan 17 '14 at 18:17
  • @TimLymington I knew that , just wanted to know was it Elu or something else
    – Argot
    Jan 17 '14 at 18:35

There is no difference between the two. Favour is the spelling used in the UK and other Commonwealth countries, while favor is the spelling used in the United States.

  • And applies to countless other words ending in ...our; colour, honour, rumour, etc.
    – WS2
    Jan 17 '14 at 19:27

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