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2 entries under idiom topic. ×

1
hard nut to crack(noun, expression, trouble, difficulty)
0
can of worms(noun, expression, trouble, difficulty)
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APASmart Define. (1970). complex problem thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/complex_problem/thesaurus/synonyms
ChicagoSmart Define. 1970. "complex problem thesaurus" https://smartdefine.org/complex_problem/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 1970, complex problem thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/complex_problem/thesaurus/synonyms>.
MLASmart Define. "complex problem thesaurus" 1 January 1970. Web. 20 September 2026. <https://smartdefine.org/complex_problem/thesaurus/synonyms>