luckiness vs fortune

luckiness and fortune both are nouns.

Word	Noun	Adjective	Verb	Adverb
luckiness	Yes	No	No	No
fortune	Yes	No	No	No

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

luckiness: an auspicious state resulting from favorable outcomes
fortune: your overall circumstances or condition in life (including everything that happens to you)

Other hypernyms of luckiness include circumstances, destiny, fate, lot, luck, portion.

luckiness (noun)	fortune (noun)
an auspicious state resulting from favorable outcomes	an unknown and unpredictable phenomenon that causes an event to result one way rather than another
	an unknown and unpredictable phenomenon that leads to a favorable outcome
	a large amount of wealth or prosperity
	your overall circumstances or condition in life (including everything that happens to you)