Crackup and Meltdown

Meltdown and crackup are semantically related. In some cases you can use "Meltdown" instead a noun "Crackup".

Meltdown noun - Severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping.

Crackup and meltdown are semantically related. Sometimes you can use "Crackup" instead a noun "Meltdown".