46 entries under difficult topic. ×

56
conundrum(noun, trouble, show, difficulty)
29
brain-teaser(noun, trouble, issue, challenge)
15
puzzler(noun, show, difficulty, issue)
12
stumper(noun, trouble, difficulty, issue)
9
dilemma(noun, trouble, issue, challenge)
9
brainteaser(noun, difficulty, issue, challenge)
9
teaser(noun, difficulty, issue, challenge)
8
head-scratcher(noun, trouble, issue, challenge)
6
crossword(noun, issue, question, task)
6
crossword puzzle(noun, expression, idiom, issue)
6
difficulty(noun, trouble, issue, challenge)
6
twister(noun, difficulty, issue, challenge)
5
quiz(noun, verb, issue, think)
4
nonplus(noun, verb, issue, think)
4
quandary(noun, trouble, issue, challenge)
4
brain twister(noun, expression, idiom, issue)
4
obscurity(noun, issue, question, secret)
4
trouble(noun, verb, adjective, issue)
4
challenge(noun, verb, difficulty, issue)
4
desideratum(noun, issue, question, task)
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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>