Engineers were concerned about the ballooning of the dam's clay core after heavy rains.

The company's spending kept ballooning despite repeated warnings from the board.

The company struggled to control its ballooning expenses last quarter.

She documented several balloonings across the countryside during her summer trip.

He filled the toy with a balloonful of air and tied it shut.

The kids released balloonfuls of glitter into the night sky, and it shimmered like a scattering of stars.

The ballooners gathered at dawn to prepare their baskets and burners for the festival's first flight.

The seasoned ballooner checked his burners and maps before the dawn flight over the valley.

The ballooneers arrived at dawn to prepare their balloons for the long-distance race.

The ballooneer skillfully guided his hot-air balloon over the festival, waving to the cheering crowd.