FOOLPROOF Synonyms: 20 Similar and Opposite Words

foolproof

adjective

Definition of foolproof

as in perfect

done, made, or planned so well that nothing can go wrong a foolproof plan DNA fingerprinting gives police a virtually foolproof way to link a suspect to a crime scene.

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of foolproof Read on for five foolproof ideas for what shoes to wear with satin pants, all inspired by street-style looks and ready to upgrade your early-fall rotation. — India Roby, Glamour, 16 July 2026 Cooking fruits and vegetables is the only foolproof way to kill the parasite, de Latour said. — Melina Khan, USA Today, 16 July 2026 Fortunately, Jennifer Garner lent us a foolproof formula while on a recent trip with her family in Virginia. — Better Homes & Gardens, 16 July 2026 Soon enough, Karl’s seemingly foolproof blackmail scheme devolves into a merciless, dog-eat-dog fight for survival, and the two men are locked in a cutthroat collision course, their fates now inextricably linked. — Ryan Lattanzio, IndieWire, 15 July 2026 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

Although umbrella insurance is far from perfect ― for instance, intentional acts are generally excluded ― umbrella insurance can provide much larger coverage amounts for things already covered by other policies with lower limits.

— Jay Adkisson, Forbes.com, 11 Aug. 2026
Brionna Jones, returning from injury and still finding her footing, went a perfect 5-of-5 from the field for 15 points.

— Christopher Harris, CBS News, 11 Aug. 2026

Definition of perfect

Adjective

Most glaring is the disparity between the top-tier clinical protocols and the logistics, which are more hapless than flawless.

— Mark Ellwood, Robb Report, 8 Aug. 2026
Their skin is flawless, their cheeks rosy, their bodies unmarked by the forces of gravity or physical strain.

— Carmen Rosenberg-Miller, Artforum, 6 Aug. 2026

Definition of flawless

Adjective

Aside from consistent, reliable bed-to-feed patterns, the major benefit of early-season deer hunting is a lack of hunting pressure.

— Josh Honeycutt, Outdoor Life, 6 Aug. 2026
Although sustainable aviation fuel is very small segment of the market, European mandates may drive airlines to seek out reliable sources in the near future.

— Tony Briscoe, Los Angeles Times, 6 Aug. 2026

Definition of reliable

Browse Nearby Words

foolishness

foolproof

fools

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Style

“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 14 Aug. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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