vis major vs calamity

vis major and calamity both are nouns.

Word	Noun	Adjective	Verb	Adverb
vis major	Yes	No	No	No
calamity	Yes	No	No	No

As nouns, calamity is a hypernym of vis major; that is, calamity is a word with a broader meaning than vis major:

vis major: a natural and unavoidable catastrophe that interrupts the expected course of events
calamity: an event resulting in great loss and misfortune

Other hypernyms of vis major include cataclysm, catastrophe, disaster, tragedy.

vis major (noun)	calamity (noun)
a natural and unavoidable catastrophe that interrupts the expected course of events	an event resulting in great loss and misfortune