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 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 If the premise is that for the Commanders to excel, Daniels needs to excel — and that’s a pretty foolproof premise — then Blough’s ability to keep his quarterback out of danger and maximize his extraordinary abilities is paramount. — Barry Svrluga, New York Times, 9 Sep. 2026 Discerning genuine niceness from manipulation lacks a foolproof method. — Tomas Chamorro-Premuzic, Forbes.com, 29 Aug. 2026 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

The Perfect Prescription is Spacemen 3’s masterpiece, an imperfect record made by one of the last holistically perfect groups of the 20th century.

— Gabriel Szatan, Pitchfork, 18 Oct. 2026
The home office that completes this level offers a perfect spot for working from home.

— James Alexander, Hartford Courant, 18 Oct. 2026

Definition of perfect

Adjective

The results suggested that people who strongly preferred flawless items had more elaborate ideas about what their ideal product was and were sensitive to even small deviations from those ideas.

— Aprajita Gautam, The Conversation, 20 Oct. 2026
Florida wasn’t flawless up front, committing multiple false starts on a day when Sumrall’s team had 55 yards on seven penalites.

— Edgar Thompson, The Orlando Sentinel, 18 Oct. 2026

Definition of flawless

Adjective

Recent strategy resets among global energy majors BP, Shell and ExxonMobil illustrate a greater focus on delivering reliable supply and ensuring that infrastructure can meet fast-growing power demand.

— H.E. Dr Abdulla Saif Al Jarwan, Fortune, 21 Oct. 2026
Their usefulness will depend on reliable navigation, robust fault responses and effective coordination between onboard systems.

— Aamir Khollam, Interesting Engineering, 20 Oct. 2026

Definition of reliable

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 23 Oct. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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