120 entries under noun topic. ×

9
whodunit(question, secret, puzzle, dilemma)
9
brainteaser(difficulty, difficult, issue, challenge)
9
teaser(difficulty, difficult, issue, challenge)
8
head-scratcher(trouble, difficult, issue, challenge)
8
labyrinth(secret, brain, twister, brain-twister)
8
mystery story(expression, idiom, question, secret)
7
bewilderment(question, secret, dilemma, mystery)
6
tough nut to crack(expression, question, secret, puzzle)
6
cipher(confidence, secret, mystery, brain-twister)
6
code(confidence, secret, mystery, cipher)
6
crossword(difficult, issue, question, task)
6
crossword puzzle(expression, idiom, difficult, issue)
6
cryptogram(difficulty, question, secret, puzzle)
6
difficulty(trouble, difficult, issue, challenge)
6
fair question(expression, idiom, question, secret)
6
maze(secret, brain, twister, brain-twister)
6
sphinx(difficulty, question, secret, puzzle)
6
twister(difficulty, difficult, issue, challenge)
5
anagram(question, problem, secret, puzzle)
5
bone of contention(expression, idiom, question, secret)
10 years ago|27k views|share |citing 
APASmart Define. (2016). enigma thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/enigma/thesaurus/synonyms
ChicagoSmart Define. 2016. "enigma thesaurus" https://smartdefine.org/enigma/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, enigma thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/enigma/thesaurus/synonyms>.
MLASmart Define. "enigma thesaurus" 1 April 2016. Web. 28 September 2026. <https://smartdefine.org/enigma/thesaurus/synonyms>