120 entries under noun topic. ×

3
doubt(issue, think, question)
3
privity(difficult, issue, question, secret)
3
uncertainty(difficult, issue, doubt, question)
3
brain-teaser orbrain-twister(question, secret, puzzle)
3
braintwister(question, secret, puzzle)
3
double-entendre(question, secret, puzzle)
3
grabber(difficulty, challenge, question, problem)
3
incongruity(difficult, issue, question, task)
3
mind-twister(question, secret, dilemma, mystery)
3
mist(verb, difficult, issue, think)
3
mysteriousness(difficult, issue, question, task)
3
proverb(difficult, issue, question, task)
3
question mark(question, secret, dilemma, mystery)
3
quodlibet(difficult, issue, question, task)
3
secrecy(issue, doubt, question, secret)
3
self-contradiction(difficult, issue, question, task)
2
confoundment(difficult, issue, question, task)
2
mystique(difficult, issue, question, task)
2
charades(secret, puzzle, mystery, riddle)
2
cross-word puzzle(expression, difficult, issue, secret)
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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>