Profitable

adj.hopeful, capableprofessional

Meaning 1

Producing more financial return than the costs incurred.

Reach for it when describing an activity or business that generates a net gain

The repair cooperative became profitable during its third winter.

playful
in the black
when informal business language can signal positive net results
not when This idiom describes current accounts and may not establish lasting profitability.
everyday
money-making
for an activity whose practical purpose is earning income
not when Money-making is blunt and unsuitable for formal financial reporting.
professional
lucrative
when the financial returns are notably large
not when Lucrative is stronger than profitable and can imply money is the chief motive.
professional
viable
if revenue is sufficient to sustain the operation
not when Viable can mean merely able to survive, not actually returning a profit.

Producing a useful, worthwhile, or instructive result.

Reach for it when praising time or effort for the nonfinancial value it creates

Their profitable discussion uncovered a simpler route through the permit process.

everyday
worthwhile
if the value justifies the time, cost, or effort
not when Worthwhile is an overall judgment and may apply despite measurable loss.
warm
fruitful
for work or conversation that produces several valuable outcomes
not when Fruitful emphasizes results and has no natural accounting sense.
professional
beneficial
when the gain may be practical, social, or personal
not when Beneficial does not convey financial return unless context supplies it.

profitable business
Careful purchasing turned the workshop into a profitable business.
highly profitable
The seasonal route became highly profitable without raising fares.
profitable exchange
A profitable exchange of ideas continued long after the panel ended.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.