Bombshell and Surpriser

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

Surpriser and bombshell are semantically related. In some cases you can replace term "Surpriser" with "Bombshell", this nouns are similar.

Surpriser noun - A captor who uses surprise to capture the victim.

Bombshell and surpriser are semantically related. Sometimes you can use "Bombshell" instead a noun "Surpriser".