32 entries under difficulty topic. ×

55
enigma(noun, trouble, show, challenge)
53
riddle(noun, trouble, show, challenge)
37
mystery(noun, trouble, show, challenge)
32
puzzle(noun, trouble, show, challenge)
28
brain-teaser(noun, trouble, show, informal)
23
problem(noun, trouble, show, challenge)
20
closed book(noun, expression, idiom, trouble, show)
17
poser(noun, trouble, show, informal)
14
secret(noun, trouble, show, challenge)
14
puzzlement(noun, trouble, show, challenge)
13
mystification(noun, trouble, show, challenge)
13
dilemma(noun, trouble, show, challenge)
5
teaser(noun, trouble, show, challenge)
4
brainteaser(noun, challenge, question, secret)
4
puzzler(noun, trouble, show, challenge)
4
difficult choice(noun, expression, trouble, show)
4
difficult decision(noun, expression, trouble, show)
4
difficult problem(noun, expression, trouble, show)
4
difficult question(expression, question, problem)
4
difficult riddle(noun, expression, trouble, show)
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APASmart Define. (2016). conundrum thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/conundrum/thesaurus/synonyms
ChicagoSmart Define. 2016. "conundrum thesaurus" https://smartdefine.org/conundrum/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, conundrum thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/conundrum/thesaurus/synonyms>.
MLASmart Define. "conundrum thesaurus" 1 April 2016. Web. 23 September 2026. <https://smartdefine.org/conundrum/thesaurus/synonyms>