Hub-and-spoke is a term commonly used to describe a transportation network in which all routes connect through a central hub. However, there are several other synonyms for this term, including radially connected, centralized, centralized network, and pivotal network. Radially connected refers to a network where all routes extend outward from one central point. Centralized and centralized network describe a system with a single hub that connects to various spokes. Pivotal network is used to describe a hub-and-spoke system that is critical to the success of the entire network. Regardless of the term used, hub-and-spoke systems are often used in transportation, telecommunications, and other industries to improve efficiency and connectivity.