International means involving two countries, a very small business can be an international business. For example, if a small bakery or dairy company of Bangkok has its one branch in USA it would be considered as international business. On other hand worldwide means involving all parts of the world, so Toyota is a worldwide brand or you can say Toyota is a global brand. Global can be used as a synonymous to worldwide. Cheers:))

Worldwide is something that covers all countries or the majority of them so they are spread across the world. International can mean dealing with one or two countries only. These terms are used as one and the same in many cases.

Intranational business would be business done within one nation. International business would be business between two or more countries. A multinational business or company would be an enterprise that focuses on world-wide business endeavors. Private companies deal with other countries for profit. Governments often do business with other countries for profit or for political reasons. worldwide vs international