1. Synonyms for Blabbermouth include gasbag, prattler, jabberer, chatterer, windbag, babbler, chatterbox, blowhard, conversationalist and Blabber

2. Synonyms for Blabbermouths include gasbags, prattlers, jabberers, chatterers, windbags, babblers, chatterboxes, blowhards, conversationalists and blabbers

3. Synonyms for Conversationalists include chatterboxes, blabbermouths, chatterers, jabberers, babblers, gasbags, prattlers, blowhards, motormouths and talkers

4. Synonyms for Conversationalist include chatterbox, blabbermouth, chatterer, jabberer, babbler, gasbag, prattler, blowhard, motormouth and talker

5. Fiona's such a prattler - I wish she'd get to the point of what she wants to say.

6. (Informal) noun chatterer, gossip, babbler, prattler, natterer, blather, blether (Scot.) My five-year-old daughter's a real little Chatterbox