Synonyms|233Antonyms|46|Broader|4Narrower|1Related|197

18 entries under challenge topic. ×

3
problem(noun, difficulty, question, secret)
3
riddle(noun, difficulty, question, problem)
2
grabber(noun, difficulty, question, problem)
2
mystery(noun, difficulty, doubt, question)
2
poser(noun, difficulty, question, secret)
2
puzzle(noun, difficulty, question, problem)
2
stumper(noun, difficulty, question, problem)
2
teaser(noun, difficulty, question, problem)
2
twister(noun, difficulty, question, problem)
1
brainteaser(noun, difficulty, question, secret)
1
intricacy(noun, question, puzzle, mystery)
1
mind-boggler(noun, doubt, question, problem)
1
puzzler(noun, difficulty, question, problem)
0
bugaboo(noun, question, puzzle, mystery)
0
cliff-hanger(noun, question, puzzle, mystery)
0
illustration(noun, question, puzzle, mystery)
0
query(noun, doubt, question, uncertainty)
0
sixty-four thousand dollar question(noun, expression, idiom, question)
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ChicagoSmart Define. 2016. "stickler thesaurus" https://smartdefine.org/stickler/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, stickler thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stickler/thesaurus/synonyms>.
MLASmart Define. "stickler thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/stickler/thesaurus/synonyms>