Crack-up and Mental disturbance

Crack-up noun - A mental or nervous collapse.

Mental disturbance and crack-up are semantically related. In some cases you can use "Mental disturbance" instead a noun phrase "Crack-up".

Mental disturbance noun - (psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness.

Crack-up and mental disturbance are semantically related. You can use "Crack-up" instead a noun phrase "Mental disturbance".