16 entries under secret topic. ×

5
classified(clandestine, underground, undisclosed, ranked)
2
hush-hush(clandestine, underground, undisclosed)
2
restricted(clandestine, underground, undisclosed, classified)
2
under wraps(expression, clandestine, underground, undisclosed)
0
clandestine(underground, undisclosed)
0
cloak-and-dagger(clandestine, underground, undisclosed)
0
closet(clandestine, underground, undisclosed)
0
confidential(clandestine, underground, undisclosed, classified)
0
covert(clandestine, underground, undisclosed)
0
off the record(expression, idiom)
0
private(clandestine, underground, undisclosed)
0
sub-rosa(clandestine, underground, undisclosed)
0
surreptitious(clandestine, underground, undisclosed)
0
top secret(expression, clandestine, underground, undisclosed)
0
under-the-table(clandestine, underground, undisclosed)
0
undercover(clandestine, underground, undisclosed)
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APASmart Define. (2015). top-secret thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/top-secret/thesaurus/synonyms
ChicagoSmart Define. 2015. "top-secret thesaurus" https://smartdefine.org/top-secret/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, top-secret thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/top-secret/thesaurus/synonyms>.
MLASmart Define. "top-secret thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/top-secret/thesaurus/synonyms>