Eternities is a term used to describe a very long period of time. It can be broken down into three related terms: Aeons (5 letters), AGES (4 letters), and EONS (4 letters). Aeons refer to an indefinite and immeasurable period of time, usually associated with the concept of eternity. AGES are a much longer period of time than a human lifespan, often referring to a period of history or a stage in the development of the world. Finally, EONS are the longest division of geological time, lasting millions of years. All three terms refer to a very long period of time, and together they form the term Eternities.