Center city is a term that refers to the central business district in a city. There are many synonyms for this term that can be used depending on the region and context. In the United States, the term downtown is commonly used to refer to the center city, while in Europe, the term city center is more commonly used. Other synonyms for center city include central business district, urban core, city core, city center, city centre, inner city, and central city. It is important to note that these synonyms may have slightly different connotations and meanings depending on the region, and in some cases, they may be used interchangeably.