15 entries under secret topic. ×

7
clandestine(adjective, show, full, sly)
7
hush-hush(adjective, show, informal, full)
7
surreptitious(adjective, full, clandestine, underground)
7
undercover(adjective, show, full, sly)
4
covert(adjective, show, full, clandestine)
2
under wraps(expression, adjective, idiom, show)
1
closet(obscure, unknown, hidden, sly)
1
huggermugger(adjective, show)
1
private(obscure, unknown, hidden, clandestine)
0
classified(obscure, unknown, clandestine, underground)
0
confidential(clandestine, underground, undisclosed, top-secret)
0
restricted(clandestine, underground, undisclosed, top-secret)
0
sub-rosa(clandestine, underground, undisclosed, top-secret)
0
top-secret(clandestine, underground, undisclosed)
0
under-the-table(clandestine, underground, undisclosed, top-secret)
11 years ago|1.3k views|share |citing 
APASmart Define. (2015). cloak-and-dagger thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/cloak-and-dagger/thesaurus/synonyms
ChicagoSmart Define. 2015. "cloak-and-dagger thesaurus" https://smartdefine.org/cloak-and-dagger/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, cloak-and-dagger thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/cloak-and-dagger/thesaurus/synonyms>.
MLASmart Define. "cloak-and-dagger thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/cloak-and-dagger/thesaurus/synonyms>