hub

noun

• The central part, usually cylindrical, of a wheel; the nave.
• A point where many routes meet and traffic is distributed, dispensed or diverted.

  "Hong Kong International Airport is one of the most important air traffic hubs in Asia."

• A central facility providing a range of related services, such as a medical hub or an educational hub
• A computer networking device connecting several Ethernet ports. See switch.
• A stake with a nail in it, used to mark a temporary point.
• A male weasel; a buck; a dog; a jack.
• The hilt of a weapon.
• A rough protuberance or projecting obstruction.

  "a hub in the road"

• An area in a video game from which most or all of the game's levels are accessed.
• A goal or mark at which quoits, etc., are thrown.
• A hardened, engraved steel punch for impressing a device upon a die, used in coining, etc.
• A screw hob.
• A block for scotching a wheel.