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Synonyms for Chatty (same or very similar meaning)

WordNet sense 1 (full of trivial conversation):
gabby, garrulous, loquacious, talkative, talky

WordNet sense 2 (marked by a ready flow of speech):

WordNet sense 3 (prone to friendly informal communication):
gossipy, newsy

WordNet sense 4 (able or tending to communicate):
communicative, communicatory

From the ODE community, based on WordNetadd/edit