"Get old" is a phrase that can describe the process of aging, or becoming more advanced in age. There are many synonyms for this phrase, including "age," "mature," "grow old," "decline," "age gracefully," "age gracefully," "age slowly," and "age well." Each of these phrases captures a different aspect of the process of growing older, and they can be used interchangeably depending on the context. Whether you are discussing the physical changes that occur with age, the wisdom that comes with experience, or the challenges and joys of life in later years, there is a synonym to describe the process of getting old that will fit perfectly.