Chider is a word used to describe someone who regularly criticizes or scolds others. Although it's not a commonly used word, there are several synonyms that can be used in its place. Some of the most common synonyms include nag, berate, admonish, harangue, and reprimand. Each of these words has its own nuances, but they all refer to someone who frequently finds fault with others. Other synonyms for chider include scolder, fault-finder, reproacher, and criticizer. No matter which word you choose, it's clear that chiders are often seen as annoying or difficult to deal with, and their constant criticism can leave others feeling frustrated and unappreciated.