"Turning a dime" is a colloquial phrase that means to suddenly change direction or switch course quickly. There are several synonyms for this phrase that can be used interchangeably, depending on the context and the tone that the speaker wants to convey. Some examples of synonyms for "turning a dime" include "doing an about-face," "making a U-turn," "switching gears," and "pivoting." These synonyms can be used in many different situations, from describing a sudden change of plans in a business meeting to talking about a quick change of direction on the basketball court. Regardless of the specific context, these phrases all convey a sense of agility, adaptability, and quick thinking.