恩讎[onshuu] love and hate
仇讎[kyuushuu] revenge

復讎[fukushuu] revenge

恩讐[onshuu] love and hate
復讐[fukushuu] revenge
復讐の念[fukushuunonen] desire for vengeance
復讐劇[fukushuugeki] revenge tragedy

復讐心[fukushuushin] desire for revenge
復讐戦[fukushuusen] return match
君父の讐は倶に天を戴かず[kunpunoadahatomonitenwoitadakazu] not wanting to live in the same world as one's father's or lord's enemies
復讐者[fukushuusha] avenger