Synonyms|410Antonyms|71|Broader|1Narrower|7Related|371
2
under-the-counter(sly, fraudulent)
2
under-the-table(secret, private, hidden, clandestine, sneaky)
2
under cover(expression, adjective, adverb, sly, clandestine)
2
unknown(secret, hidden, clandestine, underground, concealed)
2
veiled(obscure, secret, private, unknown, hidden)
2
wrapped in clouds(expression, idiom, concealment)
1
above water
1
anonymously
1
armored
1
artful(sly, fraudulent, sneaky, covert, secretive)
1
at anchor
1
back-door
1
back door
1
beclouded
1
behind-the-scenes
1
behind the curtain(expression, idiom)
1
behind the scenes(expression, idiom)
1
behind the veil(expression, idiom)
1
belowground
1
blind
For more, visit Undercover on Power Thesaurus
11 years ago|6.9k views|share |citing 
APASmart Define. (2015). undercover thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms
ChicagoSmart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, undercover thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>.
MLASmart Define. "undercover thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms>