Bolt from the blue and Volte-face

Volte-face and bolt from the blue are semantically related. In some cases you can use "Volte-face" instead a noun phrase "Bolt from the blue".

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

Bolt from the blue and volte-face are semantically related. Sometimes you can use "Bolt from the blue" instead a noun phrase "Volte-face".