When it comes to international organizations, the United Nations Agency is a term that refers to a specific group of UN bodies. But there are plenty of synonyms that can be used to describe these agencies in a broader sense. For example, the term "international agency" can be used to refer to any organization that operates on a global scale. "Inter-governmental organization" is another term that covers bodies that are established by multiple countries to work together on issues of common concern. "International institution" is a more general term that can refer to any formal group or entity involved with global affairs. Ultimately, there are many words and phrases that can be used to describe the various bodies that make up the global institutional landscape.