八尺瓊[yasakani] large jewel
八尺瓊の勾玉[yasakaninomagatama] large jewel
瓊矛[nuhoko] jeweled spear (jewelled)

天の瓊矛[amanonuhoko] Ama no Nuhoko
瓊瓊杵命[niniginomikoto] Ninigi no Mikoto (Japanese deity, grandson of Amaterasu)

珍矛[chinpoko] penis
矛盾[mujun] contradiction
矛先[hokosaki] point of spear
自己矛盾[jikomujun] self-contradiction
矛盾語法[mujungohou] oxymoron

矛盾撞着[mujundouchaku] self-contradiction
前後矛盾[zengomujun] self-contradiction
撞着矛盾[douchakumujun] self-contradiction
相矛盾[aimujun] mutually contradictory