恩を仇で返す[onwoadadekaesu] to return evil for good
仇敵[kyuuteki] bitter enemy
仇討[adauchi] vengeance
仇同士[katakidoushi] mutual enemies

仇讎[kyuushuu] revenge
商売仇[shoubaigataki] business rival
復仇[fukkyuu] reprisal
仇名[adana] nickname

哀情[aijou] sadness
愛情[aijou] love
遺伝情報[idenjouhou] genetic information
恩情[onjou] compassion
温情[onjou] warm heart

下情[kajou] condition of the common people
我情[gajou] selfishness
各情報[kakujouhou] all information
感情[kanjou] emotion
感情移入[kanjouinyuu] empathy