A group of cities can be referred to in different ways depending on the context and the purpose of communication. One term that can be used to describe a group of cities is a metropolis, which refers to a large and densely populated urban area. Other synonyms include an urban cluster, a city region, a metropolitan area or a conurbation. Furthermore, a city grouping can also be denoted as a city network, an agglomeration or city belt. All these synonyms can be employed to describe urban regions that are interconnected by various cultural, economic, and social factors. These terminologies not only enhance the diversity of language but also helps in easy communication.