Tattle
Part of speech: noun
Definition: A tattletale. Gossip; idle talk.
Part of speech: verb
Definition: To report others' wrongdoings or violations to tell on somebody; to gossip or to disclose incriminating information. To chatter.
Blab
Part of speech: verb
Definition: To tell tales; to gossip without reserve or discretion.
Part of speech: noun
Definition: One who blabs; a babbler; a telltale; a gossip or gossiper.