Shelf life is a term used to describe the amount of time a product can be stored before it becomes unsuitable for use. Some common synonyms for shelf life include expiration date, best before date, use-by date, and sell-by date. Each of these terms carries a slightly different meaning, with expiration date being the most definitive and use-by date indicating the point at which a product might become unsafe to consume. Other synonyms for shelf life include durability, longevity, viability, and staying power. Regardless of the term used, it's important to pay attention to shelf life when handling and consuming products to avoid waste and promote safety.