He hunts and fishes 'for sport'. [=he hunts and fishes because he enjoys it and not as a job or because he needs food for survival]
My brother likes 'sports'. [=he enjoys playing and/or watching games such as football, baseball, basketball, golf, etc.]
He lost but he was a 'good sport' about it. [=he was not rude or angry about losing]
(..) who had this seen... state would treason have pronounced And if the Gods themselves did see her then when she saw ...make malicious sport in mincing with his sword her husband's limbs The instant scream of honer that she made, unless things mortal move them not at all... (..)2015 Hamlet