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 Not without risk But even integration into the B-52 won’t be foolproof. — Christopher McFadden, Interesting Engineering, 11 Oct. 2026 There’s no foolproof security system to ensure that those who buzz in with a badge are necessarily the badge holders. — Laurent Belsie, Christian Science Monitor, 7 Oct. 2026 Scoring more than two goals per period is a pretty foolproof way to win hockey games. — Corey Masisak, Denver Post, 4 Oct. 2026 For polished, one-and-done outfits that are perfect for long flights and sightseeing alike, matching sets like the Prettygarden Matching Lounge Set and Ekouaer Matching Half-zip Set are foolproof picks. — Sophie Dodd, Travel + Leisure, 4 Oct. 2026 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

Over the course of this year, Hoffman has become the chief inquisitor of Griffin’s story of abuse during a superficially perfect childhood in Amarillo, Texas.

— Ben Smith, semafor.com, 2 Nov. 2026
The resort boasts three different golf courses, including an Executive Course with nine holes, perfect for those looking to squeeze in a quick game.

— Condé Nast, Condé Nast Traveler, 2 Nov. 2026

Definition of perfect

Adjective

And, by the looks of premiere photos, her complexion was juicy, plump, and flawless.

— Kyra Surgent, InStyle, 4 Nov. 2026
That kind of multiple demands absolute perfection, and recent weeks have shown exactly what happens to heavily weighted tech names that fail to deliver a flawless quarter, Alphabet and Amazon among them.

— Michael Khouw, CNBC, 2 Nov. 2026

Definition of flawless

Adjective

The other short edge holds a set of speaker grilles, a power button that doubles as a responsive and reliable fingerprint reader, and a trigger for Alexa.

— Kimberly Gedeon, PC Magazine, 3 Nov. 2026
Some of these artists genuinely intended to step aside before changing their minds years later, and others simply saw a reliable gimmick to dramatically increase ticket sales and had no actual intention of retiring.

— Andy Greene, Rolling Stone, 3 Nov. 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 7 Nov. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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