Tattletales refer to people who inform or reveal secrets or wrongdoings of others without permission. There are many synonyms that can be used in place of tattletale. Some of these include snitch, informant, squealer, betrayer, backstabber, informer, rat, stool pigeon, and whistle-blower. While some of these synonyms hold a negative connotation, others are used in a more neutral or even positive manner. For instance, a whistle-blower is someone who reports unethical or illegal activities in an organization. It is important to note that using these words to describe someone should be done thoughtfully, as they can be hurtful and damaging.