悪球[akkyuu] hard ball to hit
逸球[ikkyuu] muffed ball
衛星地球局[eiseichikyuukyoku] (satellite) earth station
眼球[gankyuu] eyeball
気球[kikyuu] balloon

球戯[kyuugi] billiards
球技[kyuugi] ball game (e.g. baseball, tennis, soccer)
球菌[kyuukin] coccus
球形[kyuukei] globular or spherical shape

印籠[inrou] seal case
引籠る[hikikomoru] to stay indoors
屑籠[kuzukago] waste basket
言籠める[iikomeru] to talk down
口籠る[kuchigomoru] to hesitate to say

籠める[komeru] to load (a gun, etc.)
参籠[sanrou] retirement (to a temple of shrine) for prayer
手籠[tegome] rape
石燈籠[ishidourou] stone lantern
切籠[kiriko] facet