Below are possible answers for the crossword clue Foolproof.
8 letter answer(s) to foolproof
FAILSAFE
1 causing a piece of machinery to revert to a safe condition in the event of a breakdown or malfunction,
2 unlikely or unable to fail.,
3 a system or plan that comes into operation in the event of something going wrong or that is in place to prevent such
9 letter answer(s) to foolproof
SURE-FIRE
certain to be successful; "a sure-fire way to get rich"
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