院宣[inzen] imperial command (decree)
共同宣言[kyoudousengen] joint declaration
口宣[kousen] oral statement
宣べる[noberu] to state
宣教[senkyou] religious mission

宣教師[senkyoushi] missionary
宣言[sengen] declaration
宣言発表[sengenhappyou] declaration
宣告[senkoku] sentence
宣誓[sensei] oath

祈誓[kisei] vow
偽り誓う[itsuwarichikau] to swear falsely
偽誓[gisei] perjury
修道誓願[shuudouseigan] vows of religious orders
誓い[chikai] oath

誓う[chikau] to swear
誓願[seigan] vow (e.g. religious)
誓言[seigen] attestation
誓文[seimon] written oath
誓約[seiyaku] written vow