Tattle-tale is a common word used to describe someone who habitually informs on others. However, there are multiple synonyms for this unsavory type of character. Among them are snitch, informant, squealer, rat, betrayer, blabbermouth, snitcher, stool pigeon, and canary. Each of these synonyms offers a slightly different connotation. A snitch is someone who informs in order to gain advantage for themselves, while a squealer is a less crude term for a tattle-tale. A rat is someone who informs out of spite, while a canary is someone who informs to avoid punishment. Whether you call someone a tattle-tale or a snitch, the act of informing on others is generally frowned upon.