Doubleback and U-turn

U-turn and doubleback are semantically related. in reversal topic. In some cases you can use "U-turn" instead a noun "Doubleback", when it comes to topics like about-face, complete change.

U-turn noun - A changing from one policy or point of view to virtually its exact opposite.

Doubleback and U-turn are semantically related. You can use "Doubleback" instead a noun phrase "U-turn".