A ferry-boat is a vessel used to transport people, vehicles, or goods across a body of water. There are a number of synonyms that can be used to describe a ferry-boat, including ferry, watercraft, transport, barge, shuttle, and boat. The term "ferry" is perhaps the most commonly used synonym, as it refers specifically to a boat used for transporting people, vehicles, or goods across a body of water. Other synonyms like watercraft, barge, shuttle, and boat can also be used to describe a ferry, but they may not always be specifically used to refer to a boat used for transportation purposes.