120 entries under noun topic. ×

2
dark secret(expression, secret, puzzle, mystery)
2
incertitude(issue, doubt, question)
2
inconclusiveness(issue, doubt, question)
2
ink crossword(expression, difficult, issue, secret)
2
mindboggler(issue, doubt, question)
2
pictorial puzzle(expression, difficult, issue, secret)
2
privacy(secret, puzzle, mystery, riddle)
1
aenigma(question, secret, puzzle, task)
1
anomaly(issue, doubt, question)
1
bitter fleabane(question, secret, puzzle, task)
1
brain-twister(question, secret, puzzle, mystery)
1
brain basher(difficult, issue, puzzle, mystery)
1
brain teaser(question, secret, puzzle, task)
1
chinese puzzle(difficult, issue, puzzle, mystery)
1
difficult problem(question, puzzle, riddle)
1
encryption(issue, doubt, question)
1
mind-breaker(question, puzzle, riddle)
1
mind-teaser(difficult, issue, puzzle, mystery)
1
mindbender(difficult, issue, puzzle, mystery)
1
puzzle problem(difficult, issue, puzzle, mystery)
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APASmart Define. (2016). enigma thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/enigma/thesaurus/synonyms
ChicagoSmart Define. 2016. "enigma thesaurus" https://smartdefine.org/enigma/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, enigma thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/enigma/thesaurus/synonyms>.
MLASmart Define. "enigma thesaurus" 1 April 2016. Web. 29 September 2026. <https://smartdefine.org/enigma/thesaurus/synonyms>