The crossword solution for the term 'IT'S JUST A NUMBER TO SOME' is AGE, which is a three letter word. AGE is a concept that has been around since the beginning of time and is used to measure the length of time someone has been alive. It is often used to determine eligibility for certain activities or privileges, such as voting or driving. To some, AGE is just a number and does not define who they are or what they can do.