Troubleshooter and Whiz

Troubleshooter noun - A worker whose job is to locate and fix sources of trouble (especially in mechanical devices).

Whiz and troubleshooter are semantically related. In some cases you can use "Whiz" instead a noun "Troubleshooter".

Whiz noun - A sound similar to the speech sound \s\ stretched out.

Troubleshooter and whiz are semantically related. Sometimes you can replace term "Troubleshooter" with "Whiz", this nouns are similar.