Chatterboxes can be described by a variety of synonyms. Some of the most common synonyms for chatterboxes include "talkative", "chatty", "garrulous", "loquacious", "voluble", "blabbermouth", "yakker", and "motor-mouth". These terms all describe individuals who talk excessively and tend to monopolize conversations. While some may find these individuals entertaining and engaging, others may find them overwhelming or annoying. Regardless of personal opinions, it's important to remember that being a chatterbox is not necessarily a negative trait - it simply means that one has a lot to say!