115 entries under difficulty topic. ×

1
cryptogram(question, secret, puzzle, knot)
1
dead end(noun, expression, trouble, pain)
1
deadlock(noun, trouble, change, pain)
1
deep water(noun, expression, trouble, pain)
1
distress(noun, trouble, burden, pain)
1
fix(noun, trouble, pain, struggle)
1
frustration(noun, trouble, pain, struggle)
1
grabber(question, secret, puzzle, knot)
1
hardship(noun, trouble, burden, pain)
1
hazard(noun, trouble, pain, struggle)
1
hindrance(noun, trouble, pain, struggle)
1
hot water(noun, expression, trouble, pain)
1
hour of decision(noun, expression, idiom, trouble, change)
1
impasse(noun, trouble, change, pain)
1
inscrutability(question, secret, puzzle, obscurity)
1
inscrutableness(question, secret, puzzle, obscurity)
1
labor(noun, trouble, pain, struggle)
1
laboriousness(noun, trouble, pain, struggle)
1
mess(noun, trouble, change, pain)
1
mindboggler(question, secret, puzzle, obscurity)
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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>