"Turn in to" is a commonly used phrase that refers to the act of changing one thing into another. However, there are a plethora of synonyms that can be used to convey the same meaning. One such synonym is "transform," which indicates a significant and noticeable change in form, appearance, or nature. Other alternatives include "convert," which implies a deliberate or formal change, and "morph," which suggests a subtle or gradual transformation over time. "Transmute," "metamorphose," and "transfigure" are all other synonyms that can be used to replace "turn in to" and convey the same sense of change or transformation.