inevitable accident vs act of God

inevitable accident and act of God both are nouns.

Word	Noun	Adjective	Verb	Adverb
inevitable accident	Yes	No	No	No
act of God	Yes	No	No	No

As nouns, inevitable accident and act of God are synonyms defined as:

inevitable accident and act of God: a natural and unavoidable catastrophe that interrupts the expected course of events

Other synonyms of inevitable accident include force majeure, unavoidable casualty, vis major.

inevitable accident (noun)	act of God (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