accident vs fortuity

accident and fortuity both are nouns.

Word	Noun	Adjective	Verb	Adverb
accident	Yes	No	No	No
fortuity	Yes	No	No	No

As nouns, accident and fortuity are synonyms defined as:

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

Other synonyms of accident include chance event, stroke.

accident (noun)	fortuity (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