Villain
Part of speech: noun
Definition: A vile, wicked person. # An extremely depraved person, or one capable or guilty of great crimes. # A deliberate scoundrel. The bad person in a work of fiction; often the main antagonist of the hero. A [http://en.wikipedia.org/wiki/Serfdom#Villeins villain] was in a low level of medieval serfdom. A [http://en.wikipedia.org/wiki/Cotter_(farmer) Cotter] may have been lower.
Example sentence: If I play a villain, I try to find his lightness and his good side. And if I play a hero or a good guy, I'll try to find his darkness or his flaws. Because I don't believe in good and evil. I believe in grays.
Scoundrel
Part of speech: noun
Definition: one without honor; a villain
Example sentence: Whoever thinks of going to bed before twelve o'clock is a scoundrel.