Built up areas, also known as urban areas, can be defined as regions that have been developed with infrastructures such as buildings, roads, and other amenities, to support human habitation and economic activities. Synonyms for built-up areas include cities, towns, metropolis, urban centers, developed regions, built-up landscapes, among others. These terms describe a geographic area that is characterized by high population density, advanced infrastructure, and economic activities that support business and trade. Urban areas are usually the core of modern society, with features that cater to the needs of the residents and provide a hub for commercial and cultural activities. Synonyms for built-up areas indicate how the urban landscape continues to evolve and adapt to human needs.