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 First, the cream-to-powder texture is foolproof—the edges smoke out with the slightest tap, making blending a dream. — Kiana Murden, Vogue, 17 Aug. 2026 The foolproof outfit formula simplifies everyday dressing and delivers double the styling options. — Kyra Surgent, InStyle, 15 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 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

Tawfik will be perfect to portray the character’s inner struggle.

— Annika Pham, Variety, 25 Aug. 2026
Gemma, founder and CEO of a growing marketing firm, thought Richard was perfect for her new VP of marketing analytics role.

— Harvard Business Review, Harvard Business Review, 24 Aug. 2026

Definition of perfect

Adjective

Conceiving it is one thing, pulling it off another entirely, and here Ballard’s technique and execution were flawless.

— Conor O'Neill, New York Times, 23 Aug. 2026
Following a 64-minute weather delay, Sanders was flawless on Cleveland's first drive, capping by connecting with wide receiver Luke Floriea for an 8-yard TD.

— ABC News, ABC News, 22 Aug. 2026

Definition of flawless

Adjective

The benefit of that consolidation has been reliable supply, standardized products and potentially lower labor costs, said Zagor.

— Brandon Gomez, CNBC, 28 Aug. 2026
Launch virtual cardiology rounds and post-discharge follow-up at rural hospitals without reliable on-site cardiology access, with capacity for expansion beyond the pilot.

— Arkansas Democrat-Gazette, Arkansas Online, 27 Aug. 2026

Definition of reliable

Browse Nearby Words

foolishness

foolproof

fools

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Cite this Entry

Style

“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 29 Aug. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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