Complainer and Scolder

Complainer noun - A person who makes frequent complaints usually about little things.

Scolder and complainer are semantically related In some cases you can use "Scolder" instead a noun "Complainer".

Scolder noun - Someone (especially a woman) who annoys people by constantly finding fault.

Complainer and scolder are semantically related in critic topic. Sometimes you can use "Complainer" instead a noun "Scolder", if it concerns topics such as faultfinder.