30 entries under noun topic. ×

4
intricacy(question, puzzle, conundrum, enigma)
4
mind-boggler(question, puzzle, conundrum, enigma)
4
nut(challenge, case, matter, knot)
4
obstacle(trouble, issue, doubt, question)
4
puzzler(question, puzzle, conundrum, enigma)
4
stumper(question, puzzle, conundrum, enigma)
4
twister(question, puzzle, conundrum, enigma)
3
division(separation, disconnection, singularity)
3
complex situation(hard situation, expression, tough, problem)
2
sticking-point(hard, difficulty, problem, predicament)
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APASmart Define. (2016). solution thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/solution/thesaurus/antonyms
ChicagoSmart Define. 2016. "solution thesaurus" https://smartdefine.org/solution/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, solution thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/solution/thesaurus/antonyms>.
MLASmart Define. "solution thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/solution/thesaurus/antonyms>