You now know that British and American English often spell the same word differently. In British English verbs that can be spelt with either –ize or –ise at the end are always spelt with –ize at the end in American English. Examples are:
British American
apologise/apologize apologize
memorise/memorize memorize
memorise/memorize memorize
organise/organize organize
realise/realize realize
recognise/recognize recognize
Of course, you can choose whether you’d rather use the American or British way of writing. Just be consistent.
