Examples from the Web for winnable
She did insist that the race would be winnable if Daines would debate her.Meet Montana's Nose-Ringed Candidate for the U.S. Senate|Ben Jacobs|August 15, 2014|DAILY BEAST
Before Mitch McConnell waded clumsily into the debate, it looked a winnable argument for the Republicans.
In terms of blood and treasure the war was not winnable for the U.S.
But in terms of strategic gains, I would say yes it was winnable.
New Hampshire has long been viewed as winnable by Team Romney.As Presidential Contest Tightens, State Races Could Prove Crucial|John Avlon|October 10, 2012|DAILY BEAST