The term "flash burn" typically refers to a type of burn injury caused by exposure to intense heat or flames for a very short period of time. Other words that can be used as synonyms for "flash burn" include scorch, singe, blaze, ignite, flame, and sear. These words all describe the same type of injury caused by heat and flames, and can be used interchangeably in most cases. It is important to note, however, that "flash burn" often refers specifically to burns caused by explosions or other sudden bursts of heat, while other synonyms may have slightly different connotations. Regardless of the wording used, it is important to take all necessary precautions to prevent burn injuries and seek medical attention if necessary.