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2 entries under expression topic. ×

1
nut to crack
1
sixty-four dollar question
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APASmart Define. (2015). tough proposition thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/tough_proposition/thesaurus/synonyms
ChicagoSmart Define. 2015. "tough proposition thesaurus" https://smartdefine.org/tough_proposition/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, tough proposition thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/tough_proposition/thesaurus/synonyms>.
MLASmart Define. "tough proposition thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/tough_proposition/thesaurus/synonyms>