Usury :  (noun)
1: an exorbitant or unlawful rate of interest [syn: vigorish]
2: the act of lending money at an exorbitant rate of interest

Cosa Nostra, Mafia, advance, advancement, advancing, bank rate, black market, bootlegging, compensatory interest, compound interest, discount rate, exorbitant interest, exploitation, extortion, gambling, gray market, gross interest, highway robbery, holdup, illegal commerce, illegal operations, illegitimate business, illicit business, interest, interest rate, lend-lease, lending, lending at interest, loan-sharking, loaning, lucrative interest, moneylending, moonshining, mortgage points, narcotics traffic, net interest, organized crime, overassessment, overcharge, penal interest, premium, price, price of money, prostitution, protection racket, racket, rate, rate of interest, shady dealings, shylocking, simple interest, surcharge, the rackets, the syndicate, traffic in women, white slavery,