Catch a Greyhound is a phrase used to describe taking a bus RIDE with Greyhound, a long-distance bus service in the United States and Canada. The term can also be used to refer to the act of catching a Greyhound bus, which is done by purchasing a ticket and boarding the bus at the designated stop. The crossword solution for this term is RIDE, which is a four-letter word that accurately describes the action of taking a Greyhound bus.