21 entries under difficulty topic. ×

8
enigma(noun, challenge, question, secret)
8
poser(noun, challenge, question, secret)
7
problem(noun, challenge, question, secret)
7
puzzle(noun, challenge, question, secret)
7
riddle(noun, challenge, question, secret)
6
conundrum(noun, challenge, question, secret)
5
mystery(noun, challenge, question, secret)
4
stumper(noun, challenge, question, secret)
4
cryptogram(noun, question, secret, puzzle)
3
teaser(noun, challenge, question, secret)
2
puzzler(noun, challenge, question, puzzle)
1
cliffhanger(noun, question, secret, puzzle)
1
crux(noun, question, secret, puzzle)
1
grabber(noun, challenge, question, secret)
1
question(noun, secret, puzzle, obscurity)
1
secrecy(noun, question, secret, puzzle)
1
sphinx(noun, question, secret, puzzle)
1
stickler(noun, challenge, question, secret)
1
subtlety(noun, question, secret, puzzle)
1
twister(noun, challenge, question, secret)
<12>
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APASmart Define. (2015). brainteaser thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/brainteaser/thesaurus/synonyms
ChicagoSmart Define. 2015. "brainteaser thesaurus" https://smartdefine.org/brainteaser/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, brainteaser thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/brainteaser/thesaurus/synonyms>.
MLASmart Define. "brainteaser thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/brainteaser/thesaurus/synonyms>