Longevity is a term that refers to the duration of something, such as a person's life span or the lifespan of a particular product. If you're looking for synonyms to replace the word "longevity," there are several options available to you. Some words that can be used in place of longevity include durability, permanence, resilience, and endurance. These words can be used to describe something that lasts for a long time and maintains its quality over an extended period. Other synonyms for longevity include longevity, long-lastingness, and longevity span. These terms are useful when discussing the life cycle of a particular product or discussing the lifespan of a person.