Other crossword clues for answer "FOOLPROOF"FOOLPROOFLike a surefire planInfallibleLike a perfect planAlways effectiveImpervious to incompetenceGuaranteedInfallible, as a schemeGuaranteed to workSure to workWhat Truman wants the disarmament system to be.Never-failing: Colloq.Safe.Risk-freeCan't-missLeaving no opportunity for errorGuaranteed against failureUnfailingSurefire