99 entries under question topic. ×

9
brainteaser(noun, difficulty, difficult, issue, challenge)
9
teaser(noun, difficulty, difficult, issue, challenge)
8
head-scratcher(noun, trouble, difficult, issue, challenge)
8
mystery story(noun, expression, idiom, secret)
7
bewilderment(noun, secret, dilemma, mystery)
6
tough nut to crack(noun, expression, secret, puzzle)
6
crossword(noun, difficult, issue, task)
6
crossword puzzle(noun, expression, idiom, difficult, issue)
6
cryptogram(noun, difficulty, secret, puzzle)
6
difficulty(noun, trouble, difficult, issue, challenge)
6
fair question(noun, expression, idiom, secret)
6
sphinx(noun, difficulty, secret, puzzle)
6
twister(noun, difficulty, difficult, issue, challenge)
5
anagram(noun, problem, secret, puzzle)
5
bone of contention(noun, expression, idiom, secret)
5
charade(noun, secret, puzzle, brain-twister)
5
field of inquiry(noun, expression, idiom, secret)
5
knotty point(noun, expression, idiom, secret)
5
matter in dispute(noun, expression, idiom, secret)
5
moot point(noun, expression, idiom, secret)
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APASmart Define. (2016). enigma thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/enigma/thesaurus/synonyms
ChicagoSmart Define. 2016. "enigma thesaurus" https://smartdefine.org/enigma/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, enigma thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/enigma/thesaurus/synonyms>.
MLASmart Define. "enigma thesaurus" 1 April 2016. Web. 23 September 2026. <https://smartdefine.org/enigma/thesaurus/synonyms>