defamer (noun)

1. The defamer spread vicious rumors about the haunted house, intensifying the horror surrounding it.

2. In the movie, the main character is portrayed as a defamer who ruins the reputation of innocent people for personal gain.

3. The villain in the comic series is a defamer, constantly spreading false accusations about the superhero to turn public opinion against him.

4. The defamer targeted the religious leader, using slander and libel to tarnish the reputation of the respected figure within the community.