The phrase "brake to smithereens" denotes breaking something into small fragments, and there are many synonyms that can be used to convey the same meaning. Some of the most common synonyms for this phrase include shatter, smash, fracture, splinter, and disintegrate. Other synonyms to consider include break apart, crush, demolish, burst, and fragment. These words can be used in various contexts, such as breaking a glass, tearing apart a piece of paper, or destroying a building. Whatever the context may be, the synonyms for "brake to smithereens" can effectively convey the idea of something being broken into many tiny pieces.