hollow ball
- spherePerfectly round solid
- bubbleAir-filled film sphere
- orbLuminous celestial body
- shellHard outer covering
- cavityEmpty space within
bounce · ping-pong · tennis · wiffle · inflatable · round · empty · air · rubber · plastic · Christmas · ornament · rattle · void · lightweight · roll · throw · blow
interior composition
hollow ballsolid ball
Orb with no cavity
solid core · cannonball · weighted ball · medicine ball · bowling ball
structural integrity
hollow ballheavy ball
Weighty spherical object
lead ball · solid core · marble · billiard ball · shot put