自己複製[jikofukusei] self-duplicating
重複保険[juufukuhoken] double insurance
単複[tanpuku] simplicity and complexity
複本[fukuhon] duplicate
複眼[fukugan] compound eyes

複合[fukugou] composite
複合語[fukugougo] compound word
複合媒体[fukugoubaitai] multimedia
複雑[fukuzatsu] complex
複雑さ[fukuzatsusa] complexity