73 entries under clandestine topic. ×

25
furtive(adjective, mean, smooth, smart, dishonest)
21
sneaky(adjective, mean, bad, smooth, wrong)
16
crafty(adjective, mean, smooth, keen, sharp)
16
cunning(adjective, mean, smooth, keen, sharp)
16
surreptitious(adjective, dishonest, deceitful, secret, sly)
16
wily(adjective, mean, smooth, keen, sharp)
15
shifty(adjective, mean, smooth, smart, honest)
15
tricky(adjective, mean, smooth, keen, sharp)
14
secret(adjective, dishonest, deceitful, hidden, sly)
13
stealthy(adjective, quiet, dishonest, cunning, deceitful)
13
underhanded(adjective, honest, false, dishonest, cunning)
12
guileful(adjective, mean, smooth, smart, honest)
11
covert(adjective, mean, secret, hidden, sly)
8
undercover(adjective, deceitful, secret, hidden, spy)
6
concealed(adjective, dishonest, cunning, deceitful, secret)
6
hidden(adjective, cunning, secret, private)
6
underground(secret, hidden, spy, fraudulent)
5
elusive(adjective, mean, smooth, smart, false)
5
private(adjective, secret, hidden, fraudulent)
4
backstairs(adjective, underground, undisclosed)
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APASmart Define. (2015). underhand thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/underhand/thesaurus/synonyms
ChicagoSmart Define. 2015. "underhand thesaurus" https://smartdefine.org/underhand/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, underhand thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/underhand/thesaurus/synonyms>.
MLASmart Define. "underhand thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/underhand/thesaurus/synonyms>