gainfulness vs profit

gainfulness and profit both are nouns.

Word	Noun	Adjective	Verb	Adverb
gainfulness	Yes	No	No	No
profit	Yes	No	Yes	No

As nouns, profit is a hypernym of gainfulness; that is, profit is a word with a broader meaning than gainfulness:

Other hypernyms of gainfulness include gain.

gainfulness (noun)	profit (noun)
the quality of affording gain or benefit or profit	the advantageous quality of being beneficial
	the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)

gainfulness (verb)	profit (verb)
	make a profit; gain money or materially
	derive a benefit from