改廃[kaihai] change
軍備撤廃[gunbiteppai] complete disarmament
公娼全廃[koushouzenpai] abolition of licensed prostitution
荒廃[kouhai] ruin
廃める[yameru] to stop

全廃[zenpai] total abolition
全廃論者[zenpaironsha] abolitionist
撤廃[teppai] annulment
廃る[sutaru] to go out of use
廃れる[sutareru] to go out of use

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