when a business produces a profit► profitable a profitable business or activity makes a profit: · We don't sell children's clothes any more - it wasn't profitable enough.· It's only in the last year that our business has become profitable. Before that we were just managing to cover our costs.
► lucrative a type of business or activity that is lucrative produces a very large profit: · Catering is a very lucrative business if you succeed in it.· Sam's journalistic work was much more lucrative than his painting had ever been.· There is still an illegal but lucrative trade in ivory between Africa and South-East Asia.
► money-spinner British informal a business or product that produces a large profit: · The little bar turned out to be a real moneyspinner.· The toy companies are always trying to find another money-spinner like Monopoly or the Barbie doll.
► goldmine informal a small business, especially a shop or restaurant, that produces a very large profit: · It's just a scruffy little beach café, but in summer it's an absolute goldmine.· I bet that corner shop's a goldmine.
a moneymaker: 
We’re hoping the show will be a real money-spinner.