What is another word for field of operation?
Pronunciation: [fˈiːld ɒv ˌɒpəɹˈe͡ɪʃən] (IPA) 
The phrase "field of operation" refers to the specific area or domain where a person or organization functions or operates. Some synonyms for this phrase include sphere of activity, arena of operation, industry, sector, business, and domain. Another possible synonym is scope, which highlights the range of activities or actions within a particular field. Furthermore, terms such as line of work, occupation, profession, and specialty can be used to describe more specific fields of operation. Overall, there are various ways to describe the area where someone operates, and the choice of words will depend on the context and situation.
