45 entries under expression topic. ×

7
off the record(adjective, idiom, adverb, intimate)
5
not for publication(adjective, idiom, adverb, sensitive)
2
between us(adverb, sensitive, eyes-only)
1
cut off(close, quiet, private, isolated)
1
hush hush
1
in ambush(restricted, clandestine, underground, discreet)
1
in confidence(adverb, sensitive, eyes-only)
1
off the beaten track(idiom, close, quiet, private)
1
on the QT(idiom, adverb, sensitive, secret)
1
shut off(close, quiet, private, isolated)
1
thick as thieves(adjective, idiom, familiar, loving)
1
top secret(adjective, idiom, secret, private)
1
tucked away(close, quiet, private, isolated)
1
under cover(adjective, secret, spy, covert)
1
under one's hat(idiom, adverb)
0
behind the scenes(idiom, special, intimate, personal)
0
buddy buddy
0
buttoned up(adverb, eyes-only)
0
carefully quarded
0
cloak and dagger(idiom, restricted, discreet)
<123>
11 years ago|7.9k views|share |citing 
APASmart Define. (2015). confidential thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/confidential/thesaurus/synonyms
ChicagoSmart Define. 2015. "confidential thesaurus" https://smartdefine.org/confidential/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, confidential thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/confidential/thesaurus/synonyms>.
MLASmart Define. "confidential thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/confidential/thesaurus/synonyms>