portion vs good fortune

portion and good fortune both are nouns.

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

As nouns, good fortune is a hyponym of portion; that is, good fortune is a word with a more specific, narrower meaning than portion:

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

Other hyponyms of portion include good luck, luckiness, providence, bad luck, ill luck, misfortune, tough luck, failure.

portion (noun)	good fortune (noun)
the allotment of some amount by dividing something	a stroke of luck
something less than the whole of a human artifact	an auspicious state resulting from favorable outcomes
an individual quantity of food or drink taken as part of a meal
assets belonging to or due to or contributed by an individual person or group
money or property brought by a woman to her husband at marriage
something determined in relation to something that includes it
your overall circumstances or condition in life (including everything that happens to you)

portion (verb)	good fortune (verb)
give out