Synonyms and related words :
babble, be indiscreet, be unguarded, betray, betray a confidence, blab, blabber, blurt, blurt out, give away, inform, inform on, leak, let drop, let fall, let slip, peach, rat, reveal a secret, sing, spill, squeal, stool, talk, tattle, tattle on, tell on, tell secrets, tell tales