Passage boat is a term that is often used to describe a type of watercraft that is designed for transporting passengers. However, there are many different synonyms for this term that can be used to describe different types of boats. Some examples of synonyms for passage boat include ferry, water taxi, water bus, canal boat, riverboat, and passenger boat. Each of these terms describes boats that are used to transport people on water, but they often have different characteristics and uses. For example, a water taxi typically operates in a specific area like a city or harbor, while a riverboat is often used for leisure cruises along scenic rivers.