What is another word for area of activity?
Pronunciation: [ˈe͡əɹi͡əɹ ɒv aktˈɪvɪti] (IPA) 
When it comes to describing the sphere or field in which a person or organization operates, there are a variety of suitable synonyms to choose from. Some of the most common terms that can be used to describe an area of activity include sector, domain, realm, arena, field, and sphere. Other alternatives might include realm, industry, specialty, discipline, niche, sphere of influence, and scope of operations. Choosing the right terminology can depend on the context and level of formality of the communication, as well as the specific industry or area of specialization involved. Regardless of the terminology chosen, having a clear understanding of what activities are included in a given area of operation is essential for effective communication.
