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