Synonyms|62Antonyms|2|Broader|3Narrower|1Related|6

27 entries under difficulty topic. ×

1
stickler(question, secret, puzzle, obscurity)
1
stumper(question, secret, puzzle, perplexity)
1
subtlety(question, secret, puzzle, obscurity)
1
teaser(question, secret, puzzle, perplexity)
1
thriller(question, secret, puzzle, subtlety)
1
twister(question, secret, puzzle, obscurity)
0
puzzler(question, puzzle, perplexity, mystery)
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APASmart Define. (2016). closed book thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/closed_book/thesaurus/synonyms
ChicagoSmart Define. 2016. "closed book thesaurus" https://smartdefine.org/closed_book/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, closed book thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/closed_book/thesaurus/synonyms>.
MLASmart Define. "closed book thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/closed_book/thesaurus/synonyms>