There are several synonyms for the word "scolder" which include "rebuker", "reprover", "chider", "nagger", "faultfinder", and "reprimander". A "scolder" is someone who constantly chastises or criticizes others, especially for small faults or mistakes. "Rebuker" and "reprover" suggest a more serious reprimand for wrongdoing, while "chider" and "nagger" are often associated with constant complaints or nagging. "Faultfinder" highlights the tendency to always find faults in others' actions, while a "reprimander" implies a more formal scolding, such as in a disciplinary setting. Overall, all of these synonyms convey the idea of someone who is quick to find fault and criticize others.