Nonevent and Wet blanket

Nonevent noun - An anticipated event that turns out to be far less significant than was expected.

Wet blanket and nonevent are semantically related. In some cases you can use "Wet blanket" instead a noun "Nonevent".

Wet blanket noun - A person who spoils the pleasure of others.

Nonevent and wet blanket are semantically related. Sometimes you can use "Nonevent" instead a noun phrase "Wet blanket".