39 entries under challenge topic. ×

5
stumper(noun, trouble, difficulty, question)
4
quandary(noun, trouble, question)
3
intricacy(noun, question, puzzle, dilemma)
3
vexed question(noun, trouble, question)
2
head-scratcher(noun, trouble, brainteaser)
2
mind-boggler(noun, doubt, question, problem)
1
cruncher(noun, trouble, question)
1
difficult question(noun, trouble, question)
1
facer(noun, trouble, question)
1
grabber(noun, difficulty, doubt, question)
1
informalposer(noun, trouble, question)
1
query(noun, dispute, doubt, question)
1
stickler(noun, difficulty, doubt, question)
1
teaser(noun, difficulty, doubt, question)
1
twister(noun, difficulty, doubt, question)
0
bugaboo(noun, question, puzzle, conundrum)
0
cliff-hanger(noun, question, puzzle, conundrum)
0
illustration(noun, question, puzzle, conundrum)
0
sixty-four thousand dollar question(noun, expression, idiom, question)
<12>
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APASmart Define. (2016). mystery thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/mystery/thesaurus/synonyms
ChicagoSmart Define. 2016. "mystery thesaurus" https://smartdefine.org/mystery/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, mystery thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/mystery/thesaurus/synonyms>.
MLASmart Define. "mystery thesaurus" 31 March 2016. Web. 29 September 2026. <https://smartdefine.org/mystery/thesaurus/synonyms>