chance event vs fortuity

chance event and fortuity both are nouns.

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

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

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

Other synonyms of chance event include accident, stroke.

chance event (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