A life jacket is a crucial safety device used by swimmers and boaters alike. However, there are several synonyms for this important item that can help us communicate more effectively about safety on the water. One potential synonym is a personal flotation device (PFD). This term encompasses a wide range of devices designed to help keep people afloat when in the water. Another possible term is a buoyancy aid, which is similar to a life jacket in that it provides additional buoyancy and buoyancy control. No matter what term you use, it is important to emphasize the importance of wearing these devices anytime you are in or near the water.