The phrase 'trail cars' can have a few synonyms that can represent the same meaning. Alternatives can be 'towed vehicles,' 'tow-behinds,' 'dinghies,' or 'caravans.' All of these terms can represent a vehicle that is hitched or pulled by another. The context in which the word 'trail cars' is used is usually in the context of camping, RVing, or road trips. Having alternative words to describe vehicles for these occasions can make communication easier and more precise. Whatever the word used, understanding the concept of a second vehicle following the main one is essential for a successful trip.