act of God vs vis major

act of God and vis major both are nouns.

Word	Noun	Adjective	Verb	Adverb
act of God	Yes	No	No	No
vis major	Yes	No	No	No

As nouns, act of God and vis major are synonyms defined as:

act of God and vis major: a natural and unavoidable catastrophe that interrupts the expected course of events

Other synonyms of act of God include force majeure, inevitable accident, unavoidable casualty.

act of God (noun)	vis major (noun)
a natural and unavoidable catastrophe that interrupts the expected course of events	a natural and unavoidable catastrophe that interrupts the expected course of events