The term "devil dusts" is often used to refer to harmful substances like asbestos or poisonous chemicals. Synonyms for this phrase could include "toxic particles," "noxious dust," "hazardous fibers," or "lethal particulates." These words convey the danger and negative impact these substances can have on human health and the environment. It's important to be aware of the risks associated with exposure to devil dusts and take necessary precautions to protect oneself. This includes wearing proper protective gear, avoiding contaminated areas, and disposing of hazardous materials in a safe and responsible manner.