The crossword solution for the term 'Not a Moment Too SOON' is SOON, which is a four-letter word. The phrase 'Not a Moment Too SOON' is often used to express relief that something happened just in time. It implies that if the event had happened any later, it would have been too late. This phrase is often used to describe situations where timing is of the essence, such as when someone narrowly avoids an accident or when a deadline is met with only seconds to spare.