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 Just pair them with a white T-shirt à la Hudson, Lawrence, and Lopez for a foolproof monochrome outfit that’ll look cute at the beach, bars, or even brunch. — Alyssa Grabinski, PEOPLE, 4 July 2026 There are several potential solutions, but none are foolproof. — John Romano, The Orlando Sentinel, 29 June 2026 Two different kinds of potatoes and the foolproof combo of seasonings will see you through this recipe. — Patricia S York, Southern Living, 27 June 2026 The strategy isn't foolproof by any means, even in intra-party Democratic primaries. — Oren Oppenheim, ABC News, 26 June 2026 See All Example Sentences for foolproof

Recent Examples of Synonyms for foolproof

Adjective

Despite Clarity’s choppy obstacle course, the tedious and frustrating tradition of counting votes and lining up bipartisan yeahs, Member by Member, is a tactic the crypto industry has time to employ and perfect.

— Cleve Mesidor, Forbes.com, 21 July 2026
The dinner theme is Paris, which is perfect for Joy, or at least should be.

— Rafaela Bassili, Vulture, 21 July 2026

Definition of perfect

Adjective

Young was flawless until the final hole, his tee shot finding a pot bunker.

— Doug Ferguson, Los Angeles Times, 19 July 2026
The Spaniards have taken the air out of the balls, played keep-away, erected a flawless defensive fortress, and hijacked tournament brackets from far more direct teams like France and England.

— Filip Bondy, New York Daily News, 19 July 2026

Definition of flawless

Adjective

As governments and technology companies search for reliable, low-carbon power solutions, micro-modular reactors are emerging as one of several technologies being explored to support future electricity demand.

— Prabhat Ranjan Mishra, Interesting Engineering, 16 July 2026
Industrial and real estate investment plunged in the first half of the year, indicating that such longtime pillars of the Chinese economy are becoming less reliable in offsetting slow consumption.

— Stephanie Yang, CNN Money, 15 July 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 23 Jul. 2026.

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Synonyms of foolproof

adjective

Example Sentences

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