The term "hospital wagon" is often used to refer to a vehicle that is specifically designed to transport patients to and from medical treatment facilities. There are several other synonyms that can be used to describe such a vehicle. The most common term is "ambulance," which is widely used in many countries. Other synonyms include "medical transport," "emergency vehicle," "medical car," and "doctor's car." Each of these terms refers to a vehicle that is used to transport patients from one location to another for medical reasons. While the specific terminology may vary depending on the country and region, all of these synonyms serve to describe the same type of vehicle - one that is used to transport patients to receive medical attention.