Antonyms for Lose (opposite meaning)
WordNet sense 1 (win something through one's efforts):
acquire, gain, win
WordNet sense 2 (come upon after searching; find the location of something that was missed or lost):
find
WordNet sense 3 (make neither profit nor loss):
break even
WordNet sense 4 (make a profit; gain money or materially):
profit
WordNet sense 5 (retain possession of):
keep
WordNet sense 6 (obtain advantages, such as points, etc.):
advance, gain ground, make headway, pull ahead, get ahead
From the ODE community, based on WordNet
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