The word railers can mean someone who is prone to criticizing others or being confrontational. Synonyms for this word include fault-finder, troublemaker, complainer, critic, and carper. Each of these words describes someone who is quick to point out flaws or problems with a situation or others' actions, often without offering a productive solution. They may also be seen as argumentative or difficult to work with, constantly nitpicking and causing unnecessary tension. It's important to remember that while constructive feedback is helpful, being a constant railer can ultimately harm relationships and hinder progress.