75 entries under noun topic. ×

3
cabala
3
classified information(expression, confidence, mystery, unrevealed)
3
esoterica
3
formula(design, conclusion, confidence, means)
3
mystification(trouble, challenge, question, puzzle)
3
paradox(trouble, challenge, question, puzzle)
3
password(confidence, mystery, unrevealed)
3
perplexity(question, problem, puzzle, obscurity)
3
private matter
2
brainteaser(question, puzzle, perplexity, obscurity)
2
cipher(confidence, mystery, unrevealed)
2
crux(trouble, challenge, question, puzzle)
2
discovery(treasure, invention)
2
head-scratcher(trouble, challenge, brainteaser)
2
stealth(hidden, spy, covert)
2
teaser(question, puzzle, knot, mystery)
2
whisper(information, hint, word, rumor)
1
problem(trouble, challenge, question, puzzle)
1
confidential information(expression, confidence, perplexity, mystery)
1
confidential matter
10 years ago|28k views|share |citing 
APASmart Define. (2016). secret thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/secret/thesaurus/synonyms
ChicagoSmart Define. 2016. "secret thesaurus" https://smartdefine.org/secret/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, secret thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/secret/thesaurus/synonyms>.
MLASmart Define. "secret thesaurus" 31 March 2016. Web. 29 September 2026. <https://smartdefine.org/secret/thesaurus/synonyms>