70 entries under difficulty topic. ×

10
enigma(noun, show, challenge, question)
9
puzzle(noun, show, challenge, question)
5
mystery(noun, show, challenge, question)
5
problem(noun, challenge, question, disadvantage)
4
conundrum(noun, show, challenge, question)
4
knot(noun, bug, puzzle, impediment)
4
perplexity(noun, show, question, puzzle)
4
poser(noun, challenge, question, puzzle)
4
teaser(noun, challenge, question, problem)
3
crux(noun, question, problem, puzzle)
3
question(noun, problem, puzzle, mystery)
3
riddle(noun, show, challenge, question)
3
stumper(noun, challenge, question, problem)
2
brainteaser(noun, challenge, question, puzzle)
2
catch(noun, trick, problem, disadvantage)
2
snag(noun, problem, obstacle, complication)
2
why(noun, question, problem, puzzle)
1
cliffhanger(noun, question, problem, puzzle)
1
closed book(noun, expression, question, puzzle)
1
cryptogram(noun, question, problem, puzzle)
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APASmart Define. (2015). puzzler thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/puzzler/thesaurus/synonyms
ChicagoSmart Define. 2015. "puzzler thesaurus" https://smartdefine.org/puzzler/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, puzzler thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/puzzler/thesaurus/synonyms>.
MLASmart Define. "puzzler thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/puzzler/thesaurus/synonyms>