Equal deadliness is a phrase that describes something that is just as deadly as something else. Synonyms for this phrase include "equally lethal", "equally fatal", and "equally deadly". These words can be used interchangeably when discussing dangerous situations or substances. For example, a chemical spill may be described as equally lethal to humans as exposure to radiation. Similarly, a certain virus may be equally fatal to people of all ages. Using synonyms for equal deadliness can help to emphasize the seriousness of a situation or the potential harm of a substance, and can help to convey the urgency of taking appropriate safety measures.