The word "lifesavers" typically refers to objects or actions that save people's lives, such as medical treatments, rescue services, or safety devices. However, there are several antonyms for "lifesavers" that imply danger or harm. For instance, "death traps" can denote places or structures that are prone to accidents, while "killers" are objects or substances that may cause fatalities, such as weapons, poisons, or diseases. "Menaces" and "threats" suggest potential harm or danger, while "time-wasters" or "ineffectuals" convey the idea of useless interventions that may even hinder or delay lifesaving efforts. In summary, the antonyms for "lifesavers" emphasize the negative aspects of risks and hazards that threaten human safety and well-being.