9 entries under brain topic. ×

55
enigma(noun, trouble, show, difficulty, challenge)
53
riddle(noun, trouble, show, difficulty, challenge)
37
mystery(noun, trouble, show, difficulty, challenge)
32
puzzle(noun, trouble, show, difficulty, challenge)
28
brain-teaser(noun, trouble, show, difficulty, informal)
23
problem(noun, trouble, show, difficulty, challenge)
13
dilemma(noun, trouble, show, difficulty, challenge)
2
difficulty(noun, question, problem)
2
quandary(noun, difficulty, question, problem)
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APASmart Define. (2016). conundrum thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/conundrum/thesaurus/synonyms
ChicagoSmart Define. 2016. "conundrum thesaurus" https://smartdefine.org/conundrum/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, conundrum thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/conundrum/thesaurus/synonyms>.
MLASmart Define. "conundrum thesaurus" 1 April 2016. Web. 22 September 2026. <https://smartdefine.org/conundrum/thesaurus/synonyms>