球 - ball, sphere

coccus

ball game (e.g. baseball, tennis, soccer)

on Earth; on the earth

balloon (hot-air, weather, etc.); blimp

sphere; globe; ball; bulb

baseball team

base on balls; walk; pass

professional baseball

fly (ball)

bases on balls and pitches striking the batsmen

combination of (varied) pitches, serves, etc.

global warming