vis major vs inevitable accident

vis major and inevitable accident both are nouns.

Word	Noun	Adjective	Verb	Adverb
vis major	Yes	No	No	No
inevitable accident	Yes	No	No	No

As nouns, vis major and inevitable accident are synonyms defined as:

vis major and inevitable accident: a natural and unavoidable catastrophe that interrupts the expected course of events

Other synonyms of vis major include act of God, force majeure, unavoidable casualty.

vis major (noun)	inevitable accident (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