A Pullman car, also known as a sleeper car, is a type of railroad passenger car that contains sleeping accommodations for passengers traveling long distances. There are numerous synonyms for Pullman car, including sleeper coach, sleeping car, berth car, and compartment car. These designations all refer to the same type of railway carriage that offers private sleeping quarters for passengers traveling overnight or for extended periods of time. Some other terms that are often used to describe Pullman cars include palace car, parlour car, and observation car. Regardless of the name used, these luxurious train cars offer passengers a comfortable and convenient way to travel long distances.