gainer

One who gains a profit or advantage.

… it is obvious that the Californian heiress is not the only gainer by an alliance which will enable her to make the easy and common transition from a Republican lady to a British peeress.

Let every youth take a leaf out of my book and make it a point to account for everything that comes into and goes out of his pocket, and like me he is sure to be a gainer in the end.

One who puts on weight.

A diving or gymnastics maneuver, from a high diving board or platform, involving a simultaneous inversion and rotation.

I tried a full gainer with a twist, the way he did it, but succeeded only in smacking the water with my thighs.

A surname.