A bookmaker is exactly the same as a sportsbook. The world’s first bookmaker set up shop in the United Kingdom back in the 1790s, and British punters still use the term “bookmaker” to refer to an individual or establishment that takes wagers. The term “sportsbook” became more widely used in the United States in order to differentiate between an establishment accepting bets on horse racing (racebook) and an establishment taking bets on all other sports (sportsbook). Yet both terms are now used across the world, and they essentially refer to the same thing.