rotund

"The bouncy ball was perfectly spherical. "

"The freshly picked flowers will wilt in a few days but for now are still fragrant."

"She offered to help with her homework."

"The child blew a perfect, orbicular bubble with their gum. "

"The tennis ball bounced off the wall before coming to rest in the ditch."

"The highlight of the hike was the sonorous cave, which produced a ringing echo from the hiker’s shouts."

"The radio announcer had an orotund voice that was pleasant to listen to. "

"My younger brother loves playing basketball after school. "

"The waiter carried the trays of food smoothly, avoiding any spills. "

"The teacher sent a circular announcing the upcoming school trip. "

"The resonant of the singer's voice filled the small concert hall. "

"Her joke was so silly it only earned a small chuckle from the audience. "