Trolley car, a common term used for electric streetcars, has a range of synonyms that are specific to certain regions or time periods. In some places, they are called "streetcars" or "tramways," while others refer to them as "trams" or "light rail vehicles." The term "interurban" was used in the early 20th century to describe electric trains running between cities. The term "rapid transit" is often used to refer to modern-day electric trains that are faster and more efficient than traditional trolley cars. Other terms like "electric trolley," "trolleybus," "trackless trolley," and "operating trolley" have been used in different contexts to describe electric transit vehicles. Regardless of the name, these vehicles have been an essential mode of transportation in urban areas for over a century.