A waterbike is a type of personal watercraft that is designed for both exercise and fun. While "waterbike" is the most commonly used term for this type of watercraft, there are several synonyms that can also be used to describe it. Some of these synonyms include hydrocycle, aquabike, pedal boat, and water tricycle. Each of these terms has a slightly different connotation, but they all refer to a watercraft that is propelled by pedaling or cycling. Whether you prefer to call it a waterbike, hydrocycle, or aquabike, this unique watercraft provides a fun and exciting way to explore the waterways.