Idiot-proof synonyms | phrases

Phrases with similar meaning for Idiot-proof

• sure-fire

  infallible
• fail-safe

  infallible
• never-failing

  infallible
• trouble-free
• tried and tested
• goof-proof
• piece of cake
• user friendly
• easy-to-use
• user-friendly
• cast-iron
• copper-bottomed
• nailed-on
• not difficult
• plain sailing