There are several synonyms for the word "babblemouths", which refers to people who talk excessively, often without thinking about what they are saying. Some common synonyms that express the same idea include chatterboxes, blabbermouths, and gabby individuals. Another synonym that may come to mind is gossips, which specifically refers to people who spread rumors or share personal information about others. Other synonyms for babblemouths might also include windbags, flibbertigibbets, and jabberers. These are all words that help to describe people who don't know when to stop talking, or who tend to say things that are of little consequence.