Four-by-four is a typical phrase that implies a vehicle with four-wheel drive capability or refers to an off-road vehicle. It's also known as a 4x4 or a SUV and sometimes referred to as a truck, jeep, or pick-up. It's essential to have a good vocabulary to express yourself well, so here are a few synonyms for four-by-four: off-road vehicle, 4WD, all-wheel-drive truck, ATV, rugged vehicle, quad bike, all-terrain vehicle, and more. These synonyms can help you describe these vehicles more accurately and make your conversation more engaging. So the next time you discuss off-road vehicles, you can use these synonyms to have a much more comprehensive and engaging discussion.