The term "four-wheeler" is commonly used to describe a type of vehicle that has four wheels. However, there are several other synonyms that can be used to refer to this type of vehicle. Some popular alternatives include "quad," "ATV" (which stands for "all-terrain vehicle"), "four-wheel-drive," "4x4," and "off-road vehicle." Each of these terms can be used in slightly different contexts depending on the type of vehicle and the activities it is used for. For example, "ATV" is often used to describe smaller, more agile vehicles that are designed for off-road use, while "four-wheel-drive" is a more general term that can describe a variety of larger vehicles such as trucks or SUVs.