When it comes to cities, they come in all shapes and sizes. For those that are on the larger side, here are some synonyms that can be used to describe them. Metropolis, megalopolis, urban center, big city, cosmopolitan, megacity, and conurbation are all words that can be used to describe a large city. Each of these words has its own connotations, with some emphasizing the size and population, while others emphasize the diversity and cultural offerings. Whether you're writing a travel guide or a research paper, using a variety of synonyms can help keep your writing fresh and engaging.