The term 'Hazard Warning' can be represented by the crossword solution 'BUOY'. A BUOY is a floating object that is used to mark a location or warn of a potential hazard. It is typically used in navigation and is often brightly colored or has flashing lights to make it more visible. Buoys are also used to mark the boundaries of shipping lanes, warn of shallow water, or indicate the presence of a submerged object.