chance event vs accident

chance event and accident both are nouns.

Word	Noun	Adjective	Verb	Adverb
chance event	Yes	No	No	No
accident	Yes	No	No	No

As nouns, chance event and accident are synonyms defined as:

chance event and accident: anything that happens suddenly or by chance without an apparent cause

Other synonyms of chance event include fortuity, stroke.

chance event (noun)	accident (noun)
anything that happens suddenly or by chance without an apparent cause	anything that happens suddenly or by chance without an apparent cause
	an unfortunate mishap; especially one causing damage or injury