prophet of doom

57 Moby Thesaurus words for "prophet of doom":
      Cassandra, Druid, Eeyore, Jeremiah, admonisher, astrologer, augur,
      calamity howler, cautioner, crystal gazer, cynic, defeatist,
      divinator, diviner, divineress, flagman, forecaster, foreknower,
      foreseer, foreshower, foreteller, fortuneteller, geomancer,
      haruspex, killjoy, lighthouse keeper, lookout, lookout man, malist,
      monitor, negativist, nihilist, palmist, pessimist, predictor,
      prefigurer, presager, prognosticator, prophesier, prophet,
      prophetess, psychic, pythoness, religious prophets, retreatist,
      seek-sorrow, seer, seeress, sentinel, sentry, signaler, signalman,
      soothsayer, vates, warner, weather prophet, worrywart