35 entries under secret topic. ×

12
confidential(adjective, close, show, intimate)
10
secret(adjective, close, sensitive, intimate)
8
restricted(adjective, close, show, hidden)
6
hush-hush(noun, adjective, intimate, private)
5
clandestine(adjective, personal, underground, undisclosed)
4
arcane(adjective, obscure, intimate, private)
4
esoteric(obscure, unknown, clandestine, underground)
4
top-secret(noun, adjective, clandestine, underground)
4
top secret(noun, expression, adjective, idiom, sensitive)
3
covert(adjective, restricted, clandestine, underground)
3
inside(adjective, intimate, private, personal)
3
intimate(adjective, private, personal, confidential)
3
under wraps(expression, idiom, sensitive, clandestine)
2
furtive(adjective, obscure, unknown, clandestine)
2
private(adjective, obscure, intimate, unknown)
2
privileged(adjective, show, sensitive, confidential)
2
sensitive(adjective, sub-rosa)
2
stealthy(adjective, clandestine, underground, undisclosed)
2
surreptitious(clandestine, underground, undisclosed, top-secret)
1
backdoor(obscure, sensitive, intimate, private)
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APASmart Define. (2015). classified thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/classified/thesaurus/synonyms
ChicagoSmart Define. 2015. "classified thesaurus" https://smartdefine.org/classified/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, classified thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/classified/thesaurus/synonyms>.
MLASmart Define. "classified thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/classified/thesaurus/synonyms>