42 entries under secret topic. ×

14
code(noun, document, cipher)
11
cipher(noun, document, code)
8
mystery(noun, difficulty, question, puzzle)
7
enigma(noun, difficulty, question, puzzle)
7
riddle(noun, difficulty, question, puzzle)
6
problem(noun, difficulty, question, puzzle)
4
puzzle(noun, difficulty, question, obscurity)
3
brainteaser(noun, difficulty, question, puzzle)
3
poser(noun, difficulty, question, puzzle)
2
maze
2
puzzlement(question, puzzle, obscurity, knot)
2
sixty-four-thousand-dollar question(expression, difficulty, question, puzzle)
2
stickler(difficulty, question, puzzle, knot)
2
stumper(difficulty, question, puzzle, knot)
2
teaser(difficulty, question, puzzle, knot)
2
tough nut to crack(expression, idiom, question, puzzle)
2
twister(difficulty, question, puzzle, knot)
1
closed book(expression, difficulty, question, puzzle)
1
mystification(question, puzzle, obscurity, knot)
1
perplexity(noun, difficulty, question, puzzle)
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APASmart Define. (2015). cryptogram thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/cryptogram/thesaurus/synonyms
ChicagoSmart Define. 2015. "cryptogram thesaurus" https://smartdefine.org/cryptogram/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, cryptogram thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/cryptogram/thesaurus/synonyms>.
MLASmart Define. "cryptogram thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/cryptogram/thesaurus/synonyms>