What is another word for principal city?
Pronunciation: [pɹˈɪnsɪpə͡l sˈɪti] (IPA) 
There are various synonyms for "principal city", with each word carrying different meanings and connotations. The term "metropolis" refers to a densely populated urban area that serves as a hub for commerce, culture, and transportation. Meanwhile, "capital" pertains to the political seat of a country or state. "Hub" signifies a central point for transportation and communication, while "core" denotes the center of a region's economic and social activities. "Megacity" refers to a city with a population exceeding ten million, and "urban center" describes a concentrated area of population and activity. Each of these synonyms for "principal city" helps to contextualize its significance, role, and status in society.
