Deciding moments are crucial points in our lives where we are required to make important choices. However, there are several words that can be used synonymously for the phrase "deciding moments". One such phrase is "turning point", which suggests a pivotal moment that can change the course of a person's life. Another option is "critical juncture", which suggests a point of extreme importance. Similarly, "watershed moment" suggests a pivotal moment that can have lasting effects on someone's life. Other alternatives include "defining moment", "key moment", and "moment of truth". Each of these phrases suggests an important moment that can shape someone's future in significant ways.