Synonyms|358Antonyms|72|Broader|2Narrower|0Related|322
3
on the sly(expression, adjective, idiom, secret, sneaky)
3
reserved
3
sharp(mean, smooth, sly)
3
sophisticated
3
spurious(adjective, deception)
3
sub-rosa(adjective, dishonest, cunning, secret, clandestine)
3
two-faced(dishonest, cunning, deceitful, sneaky, underhanded)
3
unavowed
3
under cover(expression, secret, spy, covert, recreant)
3
under wraps(expression, adjective, dishonest, secret, hidden)
3
underneath(secret, hidden, spy, covert)
3
unrevealed(adjective, secret, unknown, hidden, underground)
2
back-door
2
back door
2
backstage
2
behind-the-scenes
2
belowground
2
bogus
2
cabinet
2
catchpenny
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APASmart Define. (2015). surreptitious thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/surreptitious/thesaurus/synonyms
ChicagoSmart Define. 2015. "surreptitious thesaurus" https://smartdefine.org/surreptitious/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, surreptitious thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/surreptitious/thesaurus/synonyms>.
MLASmart Define. "surreptitious thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/surreptitious/thesaurus/synonyms>