Life expectancy refers to the period an individual is likely to live based on various factors such as genetics, lifestyle, and medical advancements. Synonyms for this term include longevity, lifespan, duration of life, life span, and survival rate. Longevity mostly refers to the length of time that a thing or a species can last. Lifespan, on the other hand, describes the length of time that a living organism is expected to live. The duration of life is yet another synonym used to describe the period between birth and death. The last two synonyms, life span and survival rate, focus on the number of individuals who survive to a particular age. Overall, these synonyms help emphasize the importance of individuals' health and wellbeing.