Synonyms|410Antonyms|71|Broader|1Narrower|7Related|371

50 entries under idiom topic. ×

1
in holes and corners(expression, adverb, sly, clandestine)
1
in private(expression, mysterious, private, reticent)
1
in the clear
1
in the wings
1
nobody the wiser
1
on the quiet(expression, adverb, dishonest, clandestine)
1
on the sly(expression, adverb, secret, clandestine)
1
out of danger
1
under house arrest
1
under the breath
1
under the rose
1
with bated breath
0
advanced guard(expression, warning)
0
behind a screen(expression, concealment)
0
cloak and dagger(expression, quiet, intriguing)
0
communicated covertly
0
hugger mugger
0
in a haze(expression, concealment)
0
in a mist(expression, concealment)
0
in the shade(expression, concealment)
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APASmart Define. (2015). undercover thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms
ChicagoSmart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, undercover thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>.
MLASmart Define. "undercover thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms>