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

20 entries under challenge topic. ×

8
enigma(noun, difficulty, question, secret)
8
poser(noun, difficulty, question, secret)
7
problem(noun, difficulty, question, secret)
7
puzzle(noun, difficulty, question, secret)
7
riddle(noun, difficulty, question, secret)
6
conundrum(noun, difficulty, question, secret)
5
mystery(noun, difficulty, question, secret)
4
stumper(noun, difficulty, question, secret)
3
teaser(noun, difficulty, question, secret)
2
puzzler(noun, difficulty, question, puzzle)
1
grabber(noun, difficulty, question, secret)
1
query(noun, question, puzzle, example)
1
stickler(noun, difficulty, question, secret)
1
twister(noun, difficulty, question, secret)
0
bugaboo(noun, question, puzzle, example)
0
cliff-hanger(noun, question, puzzle, example)
0
illustration(noun, question, puzzle, example)
0
intricacy(noun, question, puzzle, example)
0
mind-boggler(noun, question, puzzle, example)
0
sixty-four thousand dollar question(noun, expression, idiom, question)
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ChicagoSmart Define. 2015. "brainteaser thesaurus" https://smartdefine.org/brainteaser/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, brainteaser thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/brainteaser/thesaurus/synonyms>.
MLASmart Define. "brainteaser thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/brainteaser/thesaurus/synonyms>