When it comes to business districts, there are a number of synonyms that can be used to describe these areas. Some popular options include commercial center, downtown area, financial hub, business hub, and central business district. Each of these phrases has a slightly different connotation, but all refer to areas of a city or town where a high concentration of businesses are located. Depending on the context, other related terms could be used as well, such as industrial park, shopping district, or entertainment zone. Ultimately, the choice of synonym will depend on the specific location being discussed as well as the writer's preferred style of language.