自家撞着[jikadouchaku] self-contradiction
撞木[shumoku] wooden bell hammer
撞木杖[shumokuzue] crutches
撞く[tsuku] to prick
撞球[doukyuu] billiards

撞着[douchaku] contradiction
鐘撞[kanetsuki] ringing of a bell
鐘撞堂[kanetsukidou] belfry
撞着語法[douchakugohou] oxymoron
矛盾撞着[mujundouchaku] self-contradiction

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