descants

"Professor Lee's history class often went overtime because he would launch into lengthy descants on obscure details of the Roman Empire. "

"During the Christmas carol, the children's high, clear descants soared beautifully above the familiar melody sung by the adults. "

"Professor Thompson often descants on the importance of proper citation in academic writing, sometimes spending a whole lecture on the topic. "

"During the Christmas carol, the children's choir descants beautifully above the congregation's main melody. "