Synonyms|90Antonyms|27|Broader|0Narrower|3Related|64

43 entries under secret topic. ×

8
enigma(noun, difficulty, challenge, question)
8
poser(noun, difficulty, challenge, question)
7
problem(noun, difficulty, challenge, question)
7
puzzle(noun, difficulty, challenge, question)
7
riddle(noun, difficulty, challenge, question)
6
conundrum(noun, difficulty, challenge, question)
5
mystery(noun, difficulty, challenge, question)
4
stumper(noun, difficulty, challenge, question)
4
code
4
cryptogram(noun, difficulty, question, puzzle)
4
maze
3
cipher
3
perplexity(noun, question, puzzle, mystery)
3
teaser(noun, difficulty, challenge, question)
2
closed book(noun, expression, question, puzzle)
2
rebus(noun, question, puzzle, subtlety)
2
sixty-four-thousand-dollar question(noun, expression, question, puzzle)
2
tough nut to crack(noun, expression, idiom, question)
1
puzzlement(noun, question, puzzle, obscurity)
1
abstruseness(noun, question, puzzle, subtlety)
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ChicagoSmart Define. 2015. "brainteaser thesaurus" https://smartdefine.org/brainteaser/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, brainteaser thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/brainteaser/thesaurus/synonyms>.
MLASmart Define. "brainteaser thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/brainteaser/thesaurus/synonyms>