Death-dealing is a phrase commonly used to describe something that has the potential to cause death or serious harm. There are numerous synonyms that can be used in place of this phrase, including lethal, deadly, fatal, harmful, and dangerous. These words all convey similar meanings but can be used in different contexts to emphasize different aspects of the potential danger or harm. For example, lethal may be used to describe a poison or weapon that is designed to cause death, while harmful could be used to describe a substance or situation that could lead to long-term health problems. Regardless of which synonym is used, the message remains clear: whatever is being described has the potential to cause significant harm or even death.