115 entries under difficulty topic. ×

2
sixty-four-thousand-dollar question(expression, question, secret, puzzle)
2
snag(noun, trouble, pain, struggle)
2
stumper(question, secret, puzzle, knot)
2
teaser(question, secret, puzzle, knot)
2
why(question, secret, puzzle, knot)
1
abstruseness(question, secret, puzzle, obscurity)
1
adversity(noun, trouble, burden, pain)
1
affliction(noun, burden, suffering, something)
1
arduousness(noun, trouble, pain, struggle)
1
awkwardness(noun, trouble, pain, struggle)
1
barricade(noun, trouble, pain, struggle)
1
brainteaser(question, secret, puzzle, obscurity)
1
braintwister(question, secret, puzzle, obscurity)
1
burden(noun, quality, body, character, strength)
1
charade(question, secret, puzzle, obscurity)
1
check(noun, trouble, pain, struggle)
1
chiller(question, secret, puzzle, obscurity)
1
cliffhanger(question, secret, puzzle, knot)
1
complication(noun, trouble, pain, struggle)
1
crucial point(noun, expression, idiom, trouble)
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APASmart Define. (2015). crux thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/crux/thesaurus/synonyms
ChicagoSmart Define. 2015. "crux thesaurus" https://smartdefine.org/crux/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, crux thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/crux/thesaurus/synonyms>.
MLASmart Define. "crux thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/crux/thesaurus/synonyms>