prostration vs crack-up

prostration and crack-up both are nouns.

Word	Noun	Adjective	Verb	Adverb
prostration	Yes	No	No	No
crack-up	Yes	No	No	No

As nouns, crack-up is a hyponym of prostration; that is, crack-up is a word with a more specific, narrower meaning than prostration:

Other hyponyms of prostration include breakdown, shock, heat hyperpyrexia, heatstroke, algidity.

prostration (noun)	crack-up (noun)
the act of assuming a prostrate position	a mental or physical breakdown
abject submission; the emotional equivalent of prostrating your body
an abrupt failure of function or complete physical exhaustion