duality |d(y)oōˈalitē| noun ( pl. -ties) 1. the quality or condition of being dual 2. an instance of opposition or contrast between two concepts or two aspects of something; a dualism

juxtapose |ˈjəkstəˌpōz; ˌjəkstəˈpōz| verb [ trans. ] place or deal with close together for contrasting effect