Passenger locomotive, a type of train which is designed specifically for transporting people, can be referred to by various synonyms. One common equivalent term is "passenger train," which is often used to describe all trains built for the transportation of passengers, including those pulled by electric or diesel engines. Another synonymous term is "express train," which usually refers to a fast, streamlined train designed to transport passengers over long distances. Additionally, the word "railcar" can be used to describe passenger locomotives, as it is a type of self-propelled rail vehicle that can carry passengers and often includes sleeping and dining facilities.