A life-preserver, also known as a life jacket or life vest, is a crucial piece of safety equipment for anyone venturing on or near the water. Other synonyms for life-preserver include personal flotation device (PFD), buoyancy aid, life buoy, and life ring. These items are designed to keep individuals afloat and to prevent drowning in case of an accident or emergency. Depending on the situation, different types of life-preservers may be appropriate. For example, a PFD may be suitable for someone kayaking or canoeing, while a life buoy or life ring may be more appropriate for someone struggling in rough waters. It's important to know and use the appropriate synonym for your intended usage to ensure your safety.