86 entries under mystery topic. ×

9
teaser(noun, difficulty, difficult, issue, challenge)
8
head-scratcher(noun, trouble, difficult, issue, challenge)
8
mystery story(noun, expression, idiom, question, secret)
7
bewilderment(noun, question, secret, dilemma)
6
tough nut to crack(noun, expression, question, secret, puzzle)
6
cipher(noun, confidence, secret, brain-twister)
6
code(noun, confidence, secret, cipher)
6
cryptogram(noun, difficulty, question, secret, puzzle)
6
sphinx(noun, difficulty, question, secret, puzzle)
6
twister(noun, difficulty, difficult, issue, challenge)
4
brain twister(noun, expression, idiom, difficult, issue)
4
mind-boggler(noun, challenge, question, problem, secret)
4
vexed question(noun, expression, idiom, trouble, challenge)
4
challenge(noun, verb, difficulty, difficult, issue)
4
cliffhanger(noun, difficulty, question, secret, puzzle)
4
diagnus vindice nodus(noun, expression, idiom, problem, secret)
4
jigsaw puzzle(expression, idiom, secret, brain-twister)
4
knot(noun, informal, question, secret, dilemma)
4
parable(noun, question, secret, dilemma)
4
sealed book(noun, expression, idiom, problem, secret)
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APASmart Define. (2016). enigma thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/enigma/thesaurus/synonyms
ChicagoSmart Define. 2016. "enigma thesaurus" https://smartdefine.org/enigma/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, enigma thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/enigma/thesaurus/synonyms>.
MLASmart Define. "enigma thesaurus" 1 April 2016. Web. 30 September 2026. <https://smartdefine.org/enigma/thesaurus/synonyms>