Crack-up and Preposterous

Crack-up noun - A mental or nervous collapse.

Preposterous and crack-up are semantically related. in amusing topic. In some cases you can use "Preposterous" instead an adjective phrase "Crack-up".

Preposterous adjective - Conceived or made without regard for reason or reality.

Crack-up and preposterous are semantically related. Sometimes you can use "Crack-up" instead an adjective "Preposterous".