| intricacy(noun, question, puzzle, conundrum, enigma) | |
| mind-boggler(noun, question, puzzle, conundrum, enigma) | |
| nut(noun, challenge, case, matter, knot) | |
| obstacle(noun, trouble, issue, doubt, question) | |
| puzzler(noun, question, puzzle, conundrum, enigma) | |
| stumper(noun, question, puzzle, conundrum, enigma) | |
| twister(noun, question, puzzle, conundrum, enigma) | |
| division(noun, separation, disconnection, singularity) | |
| complex situation(hard situation, noun, expression, tough, problem) | |
| sticking-point(noun, hard, difficulty, problem, predicament) |
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| Chicago | Smart Define. 2016. "solution thesaurus" https://smartdefine.org/solution/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, solution thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/solution/thesaurus/antonyms>. |
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