hub
hub \'h*b\ n [prob. alter. of 2hob] 1: the central part of a wheel, propeller, or fan 2: a center of activity 3: a steel punch from which a working die for a coin or medal is made
Webster's English Dictionaryhub \'h*b\ n [prob. alter. of 2hob] 1: the central part of a wheel, propeller, or fan 2: a center of activity 3: a steel punch from which a working die for a coin or medal is made