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.

Related Words

Relevance

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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 However, this approach is not foolproof; editing, mixing with human text, or reprocessing by other AIs can dilute or remove the watermark. — Lance Eliot, Forbes.com, 13 Aug. 2026 No duh — the stars happen to be adorable puppies, and the stories sound a constant theme, that good things come in small packages, a foolproof rallying cry that fills the hearts of its target audience. — Randy Myers, Mercury News, 12 Aug. 2026 That sandboxing and permission process baked into the Cloudflare OS framework could prove helpful in practice, even if no system is foolproof. — Jeremy Hsu, ArsTechnica, 6 Aug. 2026 Briceno says gel pencils are also a foolproof way to introduce color. — Marci Robin, Allure, 24 July 2026 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

Members of the search-and-rescue team who helped save the friends say the area is extremely treacherous and potentially dangerous even in daylight and perfect conditions.

— Charlie De Mar, CBS News, 18 Aug. 2026
There is no perfect way to create player eligibility for a prospect ranking.

— Corey Pronman, New York Times, 18 Aug. 2026

Definition of perfect

Adjective

His contact balance, patience, one-cut burst and reliable hands are quite appealing.

— Brad Evans, New York Times, 20 Aug. 2026
As an alternative to Starlink, the Ukrainians have rushed to develop reliable drones equipped with AI, which offer a way to get around Russia’s counter-drone defenses.

— Simon Shuster, The Atlantic, 20 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 23 Aug. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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