Should you use '-ize' or '-ise'?

Could someone please tell me if it is wrong to use ‘-ize’ at the end of words such as ‘realize’? I have been told that this is an American spelling, and that it should be ‘realise’, but on the Oxford Dictionaries site, you use a ‘z’ for both the US and British dictionaries:


  • Hi @smilesmile
    Sorry for the late reply to your question, but thanks for raising this point - it is one that does cause confusion!
    As a general rule, you are correct (-ize would be the preferred American spelling) but have a look at this article (with a quick video), which will further clarify the issue:
    -Ize or -ise?
    I hope you find it helpful! :)

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