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

アドオン電話[adoondenwa] add-on telephone
コードレス電話[koodoresudenwa] cordless phone
テレビ電話[terebidenwa] visual telephone
圧電気[atsudenki] piezoelectricity
圧電効果[atsudenkouka] piezoelectric effect

異方導電フィルム[ihoudoudenfirumu] oriented conduction film
異方導電膜[ihoudoudenmaku] oriented conduction film
一次電流[ichijidenryuu] primary current
印加電圧[inkadenatsu] applied voltage