cataclysm vs catastrophe

cataclysm and catastrophe both are nouns.

Word	Noun	Adjective	Verb	Adverb
cataclysm	Yes	No	No	No
catastrophe	Yes	No	No	No

As nouns, cataclysm and catastrophe are synonyms defined as:

cataclysm and catastrophe: an event resulting in great loss and misfortune

Other synonyms of cataclysm include calamity, disaster, tragedy.

As nouns, cataclysm and catastrophe are synonyms defined as:

cataclysm and catastrophe: a sudden violent change in the earth's surface

cataclysm (noun)	catastrophe (noun)
an event resulting in great loss and misfortune	an event resulting in great loss and misfortune
a sudden violent change in the earth's surface	a sudden violent change in the earth's surface
	a state of extreme (usually irremediable) ruin and misfortune