disaster vs cataclysm

disaster and cataclysm both are nouns.

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

As nouns, disaster and cataclysm are synonyms defined as:

Other synonyms of disaster include calamity, catastrophe, tragedy.

disaster (noun)	cataclysm (noun)
an act that has disastrous consequences	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 state of extreme (usually irremediable) ruin and misfortune