When something falls to bits, it means it completely falls apart or disintegrates. Some synonyms for this phrase include crumbles, disintegrates, disassembles, fractures, collapses, shatters, and breaks into pieces. Each of these words describes a different way in which something can fall apart. For example, "crumbles" suggests a slow, gradual breakdown, while "shatters" implies a sudden and violent dispersal. Whether it's a physical object or a person's mental state, knowing different ways to describe falling to bits can help you communicate more precisely.