Greyhound is a breed of dog that is known for its speed and agility. It is the tallest of the sighthound breeds and is often used for racing and hunting. The term 'greyhound' can also refer to a type of BUS, which is a long-distance motor coach service. The crossword solutions for the term greyhound are BUS, a 3 letter word, and WHIPPET, a 7 letter word. The whippet is a breed of dog that is similar to the greyhound but smaller in size. It is also a sighthound breed and is often used for racing and hunting.