"She burst out" is a common phrase used to describe sudden, uncontrollable outbursts of emotion or action. However, there are several synonyms for this phrase that can be used to add variety and depth to writing. Some synonyms for "she burst out" include "she exploded," "she erupted," "she blurted out," "she spewed," "she gushed," "she let loose," and "she shouted." Each of these phrases can be used to convey a specific emotion or action, such as anger, excitement, or laughter. By using these synonyms, writers can create more descriptive and impactful writing that engages the reader.