Defamer and Fretter

Defamer noun - One who attacks the reputation of another by slander or libel.

Fretter and defamer are semantically related in critic topic. In some cases you can use "Fretter" instead a noun "Defamer", when it comes to topics like faultfinder.

Defamer and fretter are semantically related in critic topic. You can use "Defamer" instead a noun "Fretter", if it concerns topics such as faultfinder.