successfulness vs good fortune

successfulness and good fortune both are nouns.

Word	Noun	Adjective	Verb	Adverb
successfulness	Yes	No	No	No
good fortune	Yes	No	No	No

As nouns, good fortune is a hypernym of successfulness; that is, good fortune is a word with a broader meaning than successfulness:

Other hypernyms of successfulness include good luck, luckiness.

successfulness (noun)	good fortune (noun)
the condition of prospering; having good fortune	a stroke of luck
	an auspicious state resulting from favorable outcomes