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 One foolproof way to do as the Germans do is to wear their brands. — Carolin Lehmann, Travel + Leisure, 23 Aug. 2026 Luckily, there’s a foolproof way to stay dry while looking fly — cuffed jeans. — Alyssa Grabinski, PEOPLE, 20 Aug. 2026 But, as anyone who’s watched an icy soda turn watery on a summer day can probably gather, moving hard ice to warm climates wasn’t exactly foolproof. — Mack Degeurin, Popular Science, 19 Aug. 2026 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 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

The outdoor second-floor deck is perfect for taking a break between museums—there's a table with complimentary coffee, fresh fruit, water, and seltzer available all day.

— Condé Nast, Condé Nast Traveler, 4 Oct. 2026
Hotels, as well as airports, are perfect places to test this technology because their electricity usage follows quite predictable patterns.

— New Atlas, New Atlas, 4 Oct. 2026

Definition of perfect

Adjective

Small details are attended to with flawless execution—when the night is chilly, blankets appear at the dinner table; housekeeping and pool maintenance is timed so as not to interfere with your presence; transfers and shuttles are booked with ease.

— Condé Nast, Condé Nast Traveler, 6 Oct. 2026
Not every film was flawless, but few actors have ever had a stronger run of hits.

— Amy Nicholson, Los Angeles Times, 6 Oct. 2026

Definition of flawless

Adjective

Nothing Phone Nothing Phone Prime Day Deals The Nothing Phone (4a) combines a striking transparent aesthetic with a vibrant 120Hz AMOLED display and reliable daily performance.

— Juhi Wadia, PC Magazine, 6 Oct. 2026
Tonight, the guy who has been most reliable, Chris Sale, is taking the mound for the Braves in this pivotal game.

— David Troy OutKick, FOXNews.com, 6 Oct. 2026

Definition of reliable

Browse Nearby Words

foolishness

foolproof

fools

See all Nearby Words

Cite this Entry

Style

“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 9 Oct. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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