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20 entries under idiom topic. ×

3
by stealth(expression, adverb, show, clandestine)
3
on the sly(adverb, show, clandestine, quietly)
2
off the record(expression, secretly, personally, privately)
1
behind closed doors(expression, quietly, secretly, personally)
1
behind the curtain
1
behind the scenes
1
behind the veil
1
in a corner
1
in a whisper
1
in the background
1
in the dark
1
nobody the wiser
1
under cover(expression, adverb, show, clandestine)
1
under the breath
1
under the rose
1
under wraps(expression, adjective, show, secret)
1
with bated breath
0
between you and me(expression, secretly, personally, privately)
0
in on the ground floor(expression, secretly, personally, privately)
0
off the cuff(expression, secretly, personally, privately)
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APASmart Define. (2015). sub rosa thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sub_rosa/thesaurus/synonyms
ChicagoSmart Define. 2015. "sub rosa thesaurus" https://smartdefine.org/sub_rosa/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, sub rosa thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sub_rosa/thesaurus/synonyms>.
MLASmart Define. "sub rosa thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/sub_rosa/thesaurus/synonyms>