The term 'nearly forever' can be expressed in two ways: EONS (4 letters) and EON (3 letters). An EON is a very long period of time, usually millions or billions of years. It is the largest unit of geological time and is used to describe the age of the Earth and other planets. EONS are divided into eras, which are further divided into periods, epochs, and ages. Therefore, the term 'nearly forever' is an apt description for an EON, as it is a very long period of time.