fortuity vs hap

fortuity and hap both are nouns.

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

As nouns, hap is a hyponym of fortuity; that is, hap is a word with a more specific, narrower meaning than fortuity:

fortuity: anything that happens suddenly or by chance without an apparent cause
hap: an accidental happening

Other hyponyms of fortuity include break, good luck, happy chance, coincidence, happenstance, lottery.

fortuity (noun)	hap (noun)
anything that happens suddenly or by chance without an apparent cause	an accidental happening

fortuity (verb)	hap (verb)
	come to pass