Maligner and Niggler

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

Niggler and maligner are semantically related in critic topic. In some cases you can use "Niggler" instead a noun "Maligner".

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

Maligner and niggler are semantically related in critic topic. Sometimes you can use "Maligner" instead a noun "Niggler".