元寇[genkou] the Mongol Invasion
倭寇[wakou] Japanese pirates (of the Middle Ages)
入寇[nyuukou] invasion

司寇[shikou] Minister of Justice (Zhou-dynasty China)
寇する[atasuru] to harm
寇する[kousuru] to invade

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