Synonyms and related words :
babble, be indiscreet, be unguarded, bear witness against, betray, betray a confidence, blab, blabber, blow the whistle, blurt, blurt out, fink, give away, inform, inform against, inform on, leak, let drop, let fall, let slip, narc, peach, rat, reveal a secret, sell out, sing, snitch, snitch on, spill, spill the beans, squeal, stool, talk, tattle, tattle on, tell secrets, tell tales, testify against, turn informer|