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 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 Potted plants are a foolproof way to introduce color and personality to your home exterior. — Sophie Flaxman, Better Homes & Gardens, 24 Sep. 2026 Adding a preppy cardigan over a white tee and a pair of jeans is a foolproof formula that always works, but the sartorial possibilities of this breed of knitwear go far beyond that. — Camille Freestone, Glamour, 10 Sep. 2026 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

The loss spelled the end of the Chiefs’ perfect 5-0 start to the season.

— Jeff Rosen, Kansas City Star, 26 Oct. 2026
Sheet cake recipes are the easiest way to feed dessert to a crowd, meaning this recipe is perfect for the holidays.

— Mary Shannon Wells, Southern Living, 25 Oct. 2026

Definition of perfect

Adjective

Gaskins put together a nearly flawless shooting performance in the second half, scoring 14 of his 20 points in the final 20 minutes on a perfect 5 of 5 clip from the field (including 4 of 4 from three-point range).

— Jordan McPherson, Miami Herald, 24 Oct. 2026
Katsuragawa shot a flawless 8-under 63 in the third round at Woo Jeong Hills Country Club, including four birdies in his first five holes, to match Jinam Kang's record in 2006.

— ABC News, ABC News, 24 Oct. 2026

Definition of flawless

Adjective

However, reliable control and readout remain essential requirements for practical applications.

— Neetika Walter, Interesting Engineering, 28 Oct. 2026
While no real fans will turn off their NFL games because of some broadcast booth drama, the entire situation is a rare speed bump for what is otherwise the most reliable bet in all of TV.

— Alex Weprin, HollywoodReporter, 27 Oct. 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 1 Nov. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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