Whiz-bang and Whizbang

Whizbang and whiz-bang are semantically related In some cases you can use "Whizbang" instead a noun phrase "Whiz-bang".

Whizbang noun - A small high-velocity shell; it makes a whizzing sound followed by a bang when it hits.

Whiz-bang and whizbang are semantically related in great topic. You can use "Whiz-bang" instead the word "Whizbang" as a noun or an adjective, if it concerns topics such as expert.