68 entries under clandestine topic. ×

9
furtive(adjective, close, mysterious, reticent, taciturn)
7
covert(adjective, mysterious, private, reticent, taciturn)
7
surreptitious(adjective, underground, undisclosed)
6
secret(adjective, sensitive, underground, undisclosed)
6
stealthy(adjective, underground, undisclosed)
6
underground(adjective, undisclosed)
6
underhand(adjective, underground, undisclosed)
5
sneaky(adjective, underground, undisclosed)
5
underhanded(adjective, underground, undisclosed)
4
secretive(adjective, mysterious, private, restricted, reticent)
4
sly(adjective, underground, undisclosed)
3
backdoor(close, sensitive, inside, underground)
3
hidden(unknowing, underground, undisclosed, hermetical)
2
confidential(adjective, restricted, underground, discreet)
2
cryptic(adjective, close, mysterious, private, reticent)
2
hush-hush(underground, undisclosed)
2
occult(underground, undisclosed)
2
under-the-table(sensitive, unknowing, underground, undisclosed)
1
arcane(adjective, underground, undisclosed)
1
camouflaged(close, underground, undisclosed, furtive)
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APASmart Define. (2015). backstairs thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/backstairs/thesaurus/synonyms
ChicagoSmart Define. 2015. "backstairs thesaurus" https://smartdefine.org/backstairs/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, backstairs thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/backstairs/thesaurus/synonyms>.
MLASmart Define. "backstairs thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/backstairs/thesaurus/synonyms>