1) Blabbermouth 2) Gossip 3) Gossiper 4) Gossipmonger 5) Newsmonger 6) Rumormonger 7) Rumourmonger 8) Source of gossip 9) Taleteller 10) Tattler 11) Tattletale 12) Telltale 1) Blabbermouth 2) Taleteller 3) Tattler 4) Tattletale 
• (n.) One who officiously tells tales; one who impertinently or maliciously communicates intelligence, scandal, etc., and makes mischief.
Tale'bear`er noun One who officiously tells tales; one who impertinently or maliciously communicates intelligence, scandal, etc., and makes mischief. « Spies and talebearers , encouraged by her father, did their best to inflame her resentment.» Macaulay.