24 entries under challenge topic. ×

3
mind-boggler(noun, doubt, question, uncertainty)
3
mind-breaker(noun, trouble, puzzle, riddle)
2
head-scratcher(noun, trouble, show, difficulty)
2
perplexity(noun, trouble, show, difficulty)
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APASmart Define. (2016). conundrum thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/conundrum/thesaurus/synonyms
ChicagoSmart Define. 2016. "conundrum thesaurus" https://smartdefine.org/conundrum/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, conundrum thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/conundrum/thesaurus/synonyms>.
MLASmart Define. "conundrum thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/conundrum/thesaurus/synonyms>