15 entries under knot topic. ×

4
secret(question, problem, puzzle, obscurity)
1
stumper(difficulty, question, secret, puzzle)
1
teaser(difficulty, question, secret, puzzle)
1
cliffhanger(difficulty, question, secret, puzzle)
1
crux(difficulty, question, secret, puzzle)
1
cryptogram(difficulty, question, secret, puzzle)
1
grabber(difficulty, question, secret, puzzle)
1
mystification(question, secret, puzzle, obscurity)
1
perplexity(noun, difficulty, question, secret, puzzle)
1
problem(difficulty, question, secret, puzzle)
1
puzzlement(question, secret, puzzle, obscurity)
1
question(difficulty, secret, puzzle, obscurity)
1
stickler(difficulty, question, secret, puzzle)
1
twister(difficulty, question, secret, puzzle)
1
why(difficulty, question, secret, puzzle)
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APASmart Define. (2015). sphinx thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sphinx/thesaurus/synonyms
ChicagoSmart Define. 2015. "sphinx thesaurus" https://smartdefine.org/sphinx/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, sphinx thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sphinx/thesaurus/synonyms>.
MLASmart Define. "sphinx thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/sphinx/thesaurus/synonyms>