This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The quality of being profitable; gainfulness; usefulness; advantageousness.

n. The quality of being profitable; gainfulness; usefulness; advantageousness: as, the profitableness of trade.

n. the quality of affording gain or benefit or profit

n. the quality of being encouraging or promising of a successful outcome

"Presently, Ischomachus proceeded: Now it is of prime importance,428 in reference to the profitableness or unprofitableness of agriculture, even on a large estate where there are numerous429 workfolk,430 whether a man takes any pains at all to see that his labourers are devoted to the work on hand during the appointed time,431 or whether he neglects that duty."

profit    gain   

energy-saver    aphasiology    philologer    nonproduction    valuelessness