62 entries under expression topic. ×

1
off the beaten track(idiom, close, quiet, private)
1
off the record(adjective, idiom, separate, secret)
1
on the QT(idiom, mysterious, secret, reticent)
1
on the sly(idiom, secret, private, hidden)
1
roof over head(noun, idiom, cover, protection)
1
top secret(clandestine, underground, undisclosed)
1
tucked away(close, quiet, secret, hidden)
1
under an eclipse
1
under false pretense(idiom, clandestine, underground, undisclosed)
1
under house arrest
1
under the surface
1
wrapped in clouds
0
book binding
0
by implication(idiom, latency implication)
0
by inference(idiom, latency implication)
0
cloak and dagger(idiom, quiet, intriguing)
0
cover song
0
cover version
0
covered over(verb, phrasal verb)
0
covering fire
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APASmart Define. (2015). covert thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/covert/thesaurus/synonyms
ChicagoSmart Define. 2015. "covert thesaurus" https://smartdefine.org/covert/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, covert thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/covert/thesaurus/synonyms>.
MLASmart Define. "covert thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/covert/thesaurus/synonyms>