39 entries under puzzle topic. ×

7
mystery(noun, difficulty, question, secret)
7
subtlety(noun, difficulty, question, secret)
5
difficulty(noun, challenge, question, secret)
2
closed book(expression, question, secret, subtlety)
2
inscrutability(noun, difficulty, question, secret)
2
sixty-four-thousand-dollar question(expression, question, secret, subtlety)
2
tough nut to crack(expression, idiom, difficulty, question, secret)
1
brainteaser(noun, difficulty, challenge, question, secret)
1
braintwister(difficulty, question, secret, subtlety)
1
charade(difficulty, question, secret, subtlety)
1
chiller(difficulty, question, secret, subtlety)
1
cliffhanger(difficulty, question, secret, obscurity)
1
crux(difficulty, question, secret, obscurity)
1
cryptogram(difficulty, question, secret, obscurity)
1
grabber(difficulty, question, secret, perplexity)
1
inscrutableness(difficulty, question, secret, subtlety)
1
mindboggler(difficulty, question, secret, subtlety)
1
mystification(question, secret, obscurity, subtlety)
1
occult(difficulty, question, secret, subtlety)
1
oracle(difficulty, question, secret, subtlety)
<12>
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APASmart Define. (2015). abstruseness thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/abstruseness/thesaurus/synonyms
ChicagoSmart Define. 2015. "abstruseness thesaurus" https://smartdefine.org/abstruseness/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, abstruseness thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/abstruseness/thesaurus/synonyms>.
MLASmart Define. "abstruseness thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/abstruseness/thesaurus/synonyms>