profitability vs gainfulness

profitability and gainfulness both are nouns.

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

As nouns, profitability and gainfulness are synonyms defined as:

profitability and gainfulness: the quality of affording gain or benefit or profit

Other synonyms of profitability include lucrativeness, profitableness.

profitability (noun)	gainfulness (noun)
the quality of affording gain or benefit or profit	the quality of affording gain or benefit or profit