“-zation” vs “-sation”?
Each post has an indicator which summarises who the post is shared.
What is the difference between these two terms?
Should I write summarises or summarizes?
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Summarize Summarise COCA 1135 10 BNC 199 264
Summarise is more common in British English, where summarize can also be found frequently.
Summarize is more common in American English, where summarise is rarely used.
Note: this page in the Wikipedia contains a long list of words that end with "ize" or "ise" depending on whether the usage is American English or British English. You will find words like summarize(ise), organize(ise), authorize(ise) and many others there.