悔改める[kuiaratameru] to repent
改まる[aratamaru] to be renewed
改めて[aratamete] another time
改める[aratameru] to change
改悪[kaiaku] deterioration

改印[kaiin] changing seals
改革[kaikaku] reform
改革案[kaikakuan] reform proposal
改革過程[kaikakukatei] reform process
改憲[kaiken] constitutional change

愛称[aishou] pet name
異称[ishou] alias
一人称[ichininshou] first person
仮称[kashou] temporary name
雅称[gashou] correct name

改称[kaishou] renaming
偽称[gishou] assuming a false name
旧称[kyuushou] old name
敬称[keishou] title of honour
謙称[kenshou] refer to modestly