Mow down is a term that refers to the act of destroying or flattening something. The crossword solutions for this term are DESTROY (7 letters), MASSACRE (8 letters), FLATTEN (7 letters), and LEVEL (5 letters). DESTROY means to demolish or ruin something, MASSACRE implies a violent and brutal destruction, FLATTEN means to make something flat or LEVEL, and LEVEL means to make something even or balanced. All of these words describe the act of mowing down something, which is the act of destroying or flattening it.