"Turned dime" is a phrase that means to make a sudden and unexpected change of direction or behavior. There are several synonyms for this phrase that one can use to describe a similar action. One such synonym is "changed course," which implies a redirection in the path one is taking. Another option is "made a U-turn," which denotes a complete reversal in direction. One could also use "shifted gears," which suggests a change in approach or strategy. Other alternatives include "switched tracks," "made a 180-degree turn," or even "did an about-face." All of these synonyms provide colorful and descriptive language to describe a sudden change in direction.