Monopolise vs. Monopolize — What's the Difference?

Monopolise is the spelling predominantly used in British English, reflecting the typical British preference for "-ise" endings in words like organise and realise. On the other hand, monopolize is the preferred form in American English, aligning with the American usage of "-ize" endings in similar verbs such as organize and realize.

In academic and professional writing within the UK and Commonwealth countries, monopolise is the standard form, ensuring consistency with other British English conventions. Whereas in the United States, monopolize is consistently used, matching the orthographic style of American publications and institutions.

The choice between monopolise and monopolize can also influence the perception of text's formality and origin. While monopolise might appear more traditional or formal to some British readers, monopolize is often perceived as the more internationally recognized form due to American media's global influence.

Educational systems in the UK teach the "-ise" spelling as correct, embedding this preference from an early age. On the other hand, American schools teach the "-ize" spelling, reinforcing this as the standard American English form.

While both spellings are accepted by many international English dictionaries, they often list "monopolize" as the primary entry, with "monopolise" as a variant, reflecting the global dominance of American English. In contrast, British dictionaries like the Oxford English Dictionary may list "monopolise" first, followed by "monopolize" as the American variant.