8
conundrum(noun, question, puzzle, riddle)
2
labyrinth
1
enigma
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APASmart Define. (2015). brainteaser thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/brainteaser/thesaurus/narrower
ChicagoSmart Define. 2015. "brainteaser thesaurus" https://smartdefine.org/brainteaser/thesaurus/narrower (accessed September 21, 2026).
HarvardSmart Define 2015, brainteaser thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/brainteaser/thesaurus/narrower>.
MLASmart Define. "brainteaser thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/brainteaser/thesaurus/narrower>