17 entries under difficulty topic. ×

66
riddle(noun, trouble, show, challenge)
59
mystery(noun, trouble, show, dispute)
56
conundrum(noun, trouble, show, difficult)
43
puzzle(noun, trouble, show, dispute)
29
problem(noun, trouble, issue, challenge)
15
poser(noun, trouble, challenge, question)
15
puzzler(noun, show, difficult, issue)
13
perplexity(noun, show, question, secret)
12
stumper(noun, trouble, difficult, issue)
9
brainteaser(noun, difficult, issue, challenge)
9
teaser(noun, difficult, issue, challenge)
6
cryptogram(noun, question, secret, puzzle)
6
sphinx(noun, question, secret, puzzle)
6
twister(noun, difficult, issue, challenge)
4
challenge(noun, verb, difficult, issue)
4
cliffhanger(noun, question, secret, puzzle)
3
grabber(noun, challenge, question, problem)
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APASmart Define. (2016). enigma thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/enigma/thesaurus/synonyms
ChicagoSmart Define. 2016. "enigma thesaurus" https://smartdefine.org/enigma/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, enigma thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/enigma/thesaurus/synonyms>.
MLASmart Define. "enigma thesaurus" 1 April 2016. Web. 20 September 2026. <https://smartdefine.org/enigma/thesaurus/synonyms>