1. Baddie: a bad person, especially a villain or a villain’s underling in a novel, a film, or a television program (usually lighthearted)
2. Beast: a reprehensible person, especially one with coarse, violent habits
3. Black sheep: an amoral, dishonorable person
3. Blackguard: a reprehensible person
4. Brute: a violent person
5. Bully: a violent person, especially one who intimidates or hurts weaker people
6. Cad: a thoughtless, uncaring man
7. Caitiff: a coward or a reprehensible person
8. Cutthroat: a vicious person
9. Dastard: a coward, or a deceitful or treacherous person
10. Desperado: a criminal, especially in the Old West
11. Devil: an evil person
12. Evildoer: a person who commits evil acts
13. Fiend: a malicious or wicked person; alternatively, an addict, a fanatic, or a…