Come of age is a term used to describe the transition from childhood to adulthood. It is often associated with reaching a certain age, such as 18 or 21, but can also refer to a process of gaining maturity and independence. In this crossword, the solutions MATURE, RIPEN, and GROWUP all refer to the idea of coming of age. MATURE implies that someone has reached a level of maturity, while RIPEN suggests that someone has developed over time, and GROWUP implies that someone has grown up and become an adult.