What words are spelled the British way with an S instead of American a Z?

You're likely thinking of words that use the spelling "-ise" in British English, while American English uses "-ize".

Here are some examples:

* Analyse (British) / Analyze (American)

* Realise (British) / Realize (American)

* Organise (British) / Organize (American)

* Patronise (British) / Patronize (American)

* Memorise (British) / Memorize (American)

* Utilise (British) / Utilize (American)

This difference in spelling is just one of many between British and American English.