Thesaurus
Synonyms & Antonyms of foolproof
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.
Synonyms & Near Synonyms for foolproof
Antonyms & Near Antonyms for foolproof
Keep scrolling for more
Comments on foolproof
What made you want to look up foolproof? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Namesakes Word Quiz
- Which of the following is a fruit named after a Moroccan seaport?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- Namesakes Word Quiz
When names become words and then we ask you about...
Take the quiz - Farm Idioms Quiz
Not your children's farm quiz.
Take the quiz - Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz - Dictionary Devil
The dictionary has been scrambled—can you put i...
Play the game
Share foolproof
Time Traveler for foolproof
The first known use of foolproof was in 1902
See more words from the same year