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 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 The foolproof outfit formula simplifies everyday dressing and delivers double the styling options. — Kyra Surgent, InStyle, 15 Aug. 2026 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

The pass the Netherlands forward wrapped into Alexander Isak’s feet was perfect.

— Stuart James, New York Times, 8 Sep. 2026
The Hoosiers have won 17 straight games, the longest active winning streak in the Football Bowl Subdivision, and are a perfect 16-0 at home under Cignetti.

— Arkansas Online, Arkansas Online, 8 Sep. 2026

Definition of perfect

Adjective

The operators who succeed in the years ahead will be those who understand that being a good actor is not about being flawless.

— Jeff Cook, New York Daily News, 15 Sep. 2026
Walker is one of many performers who has to blend specialty skills with traditional acting to form one flawless company.

— Jenelle Riley, Los Angeles Times, 14 Sep. 2026

Definition of flawless

Browse Nearby Words

foolishness

foolproof

fools

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“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 19 Sep. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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