surefire

36 Moby Thesaurus words for "surefire":
      assured of success, calculable, certain, coming,
      crowned with success, dependable, faithful, faithworthy, fast,
      firm, fortunate, invincible, made, on the up-and-up, on top,
      out in front, predictable, prosperous, reliable, secure, solid,
      sound, stable, staunch, steadfast, steady, substantial, succeeding,
      successful, sure, triumphant, trustworthy, trusty, unfailing,
      well-founded, well-grounded