The term 'Greyhound, E.G.' is an example of a breed of DOG, a type of BUS, a type of RACER, and a type of BUS line. Greyhounds are a breed of DOG that is known for its slender build and long legs, making them ideal for racing. They are also popular as pets due to their friendly and gentle nature. Greyhound buses are a type of BUS that is used for long-distance travel. Greyhound racing is a type of racing in which dogs compete against each other to see who can run the fastest. Finally, Greyhound BUS Lines is a company that provides intercity BUS service in the United States and Canada.