The term 'Greets the Villain' can be summarized by two crossword solutions: HISSES (6 letters) and BOOS (4 letters). Hissing is a sound made by a snake or other reptile, and is often used to express disapproval or contempt. Booing is an expression of disapproval or contempt, usually expressed by shouting or making a loud noise. Both hissing and booing are common reactions when someone is greeted by a villain.