Defamer and Nitpicker

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

Nitpicker and defamer are semantically related in critic topic. In some cases you can use "Nitpicker" instead a noun "Defamer".

Nitpicker noun - A person given to harsh judgments and to finding faults.

Defamer and nitpicker are semantically related in critic topic. Sometimes you can use "Defamer" instead a noun "Nitpicker".