own up

own up
    v 1: admit or acknowledge a wrongdoing or error; "the writer of
         the anonymous letter owned up after they identified his
         handwriting" [syn: {make a clean breast of}, {own up},
         {fess up}]
    

20 Moby Thesaurus words for "own up":
      acknowledge, admit, admit everything, allow, avow, come clean,
      concede, confess, cop a plea, grant, let on, open up, out with it,
      own, plead guilty, spill, spill it, spit it out, tell all,
      tell the truth