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

43 entries under puzzle topic. ×

1
cliffhanger(difficulty, question, secret, obscurity)
1
cryptogram(difficulty, question, secret, obscurity)
1
difficulty(question, secret, obscurity, subtlety)
1
dilemma(noun, trouble, challenge)
1
grabber(difficulty, question, secret, perplexity)
1
inscrutability(difficulty, question, secret, subtlety)
1
inscrutableness(difficulty, question, secret, subtlety)
1
mindboggler(difficulty, question, secret, subtlety)
1
occult(difficulty, question, secret, subtlety)
1
oracle(difficulty, question, secret, subtlety)
1
perplexity(noun, difficulty, question, secret)
1
question(difficulty, secret, obscurity, subtlety)
1
rebus(question, secret, subtlety, mystery)
1
rune(difficulty, question, secret, subtlety)
1
secrecy(difficulty, question, secret, obscurity)
1
sphinx(difficulty, question, secret, perplexity)
1
stickler(difficulty, question, secret, obscurity)
1
stumper(difficulty, question, secret, perplexity)
1
subtlety(difficulty, question, secret, obscurity)
1
teaser(difficulty, question, secret, perplexity)
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APASmart Define. (2016). closed book thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/closed_book/thesaurus/synonyms
ChicagoSmart Define. 2016. "closed book thesaurus" https://smartdefine.org/closed_book/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, closed book thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/closed_book/thesaurus/synonyms>.
MLASmart Define. "closed book thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/closed_book/thesaurus/synonyms>