calumny

noun

1.
a false accusation of an offense or a malicious misrepresentation of someone's words or actions
aftertale back-biting evil-speaking missaw calumniation defamation hatchet job obloquy traducement
Derived from:
calumniate calumnious
2.
an abusive attack on a person's character or good name
aspersion defamation denigration slander
Derived from:
calumniate calumnious