Is it international organisation or organization?

Organisation and organization are two spellings of the same noun. The spelling depends on the type of English.

  • In British English, you write “international organisation,” unless you follow Oxford style guidelines. In that case, you write “international organization.”
  • In American English, you write “international organization.”

The same difference applies to words ending in -ize or -yze, such as recognize or recognise, analyze or analyse, finalize or finalise, minimize or minimise, and organize or organise.

It’s important to choose one type of English and use it consistently. The QuillBot Grammar Checker can help you with this.