Bombshell and Setback

Bombshell noun - Something that makes a strong impression because it is so unexpected.

Setback and bombshell are semantically related. in surprise topic. In some cases you can use "Setback" instead a noun "Bombshell", when it comes to topics like catastrophe.

Setback noun - A change in status for the worse usually temporarily.

Bombshell and setback are semantically related. Sometimes you can use "Bombshell" instead a noun "Setback".