70 entries under clandestine topic. ×

0
closet(secret, underground, undisclosed)
0
clouded(underground, undisclosed)
0
confidential(secret, underground, undisclosed, classified)
0
conspiratorial(underground, undisclosed)
0
covered(underground, undisclosed)
0
covert(secret, underground, undisclosed)
0
deep(underground, undisclosed)
0
discreet(underground, undisclosed)
0
disguised(underground, undisclosed)
0
dissembled(underground, undisclosed)
0
dissimulated(underground, undisclosed)
0
enigmatical(underground, undisclosed)
0
furtive(underground, undisclosed)
0
in ambush(expression, underground, undisclosed)
0
incognito(underground, undisclosed)
0
inside(underground, undisclosed)
0
mystic(underground, undisclosed)
0
mystical(underground, undisclosed)
0
obscure(underground, undisclosed)
0
on the QT(expression, idiom, underground, undisclosed)
11 years ago|761 views|share |citing 
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>