The Collaborative International Dictionary
Gainfulness
Gainful \Gain"ful\, a.
Profitable; advantageous; lucrative. ``A gainful
speculation.''
--Macaulay. -- Gain"ful*ly, adv. --
Gain"ful*ness, n.
Wiktionary
gainfulness
n. The state or quality of being gainful; profitableness.