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

50 entries under idiom topic. ×

6
under wraps(expression, adjective, show, dishonest)
3
sub rosa(expression, adjective, show, secret)
3
under an eclipse(expression, concealment)
2
in ambush(expression, clandestine, underground, undisclosed)
2
in the dark(expression, reticent, unknown, taciturn)
2
hush hush
2
in a cloud(expression, concealment)
2
in a fog(expression, concealment)
2
in disguise(expression, adverb, concealment, furtively)
2
in hiding(expression, concealment)
2
in secret
2
in the background(expression, mysterious, reticent, taciturn)
2
on the QT(expression, adjective, adverb, dishonest)
2
wrapped in clouds(expression, concealment)
1
behind the curtain
1
behind the scenes
1
behind the veil
1
high and dry
1
in a corner
1
in a whisper
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APASmart Define. (2015). undercover thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms
ChicagoSmart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, undercover thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>.
MLASmart Define. "undercover thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms>