There are a variety of synonyms for the phrase "go/turn red," each with its own particular nuance or connotation. Some common alternatives include "blush," which often implies a sense of embarrassment or shyness, as well as "flush," which can suggest a broader range of emotions, such as anger or arousal. "Redden" or "crimson" may imply a more intense or enduring transformation, while "rosy" or "pink" might convey a more subtle or gradual shift in color. Other options include "blanch," meaning to become pale or white with fear or shock, or "burn," which suggests a more painful or intense sensation.