31 entries under adjective topic. ×

9
furtive(close, mysterious, reticent, taciturn)
7
clandestine(underground, undisclosed)
7
covert(mysterious, private, reticent, taciturn)
7
surreptitious(clandestine, underground, undisclosed)
7
undercover(mysterious, private, reticent, taciturn)
6
secret(sensitive, clandestine, underground, undisclosed)
6
stealthy(clandestine, underground, undisclosed)
6
underground(clandestine, undisclosed)
6
underhand(clandestine, underground, undisclosed)
5
backstair
5
sneaky(clandestine, underground, undisclosed)
5
underhanded(clandestine, underground, undisclosed)
4
hole-and-corner
4
hugger-mugger
4
secretive(mysterious, private, restricted, reticent)
4
sly(clandestine, underground, undisclosed)
3
skulking
3
sneaking
2
confidential(restricted, clandestine, underground, discreet)
2
cryptic(close, mysterious, private, reticent)
<12>
11 years ago|1.3k views|share |citing 
APASmart Define. (2015). backstairs thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/backstairs/thesaurus/synonyms
ChicagoSmart Define. 2015. "backstairs thesaurus" https://smartdefine.org/backstairs/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, backstairs thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/backstairs/thesaurus/synonyms>.
MLASmart Define. "backstairs thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/backstairs/thesaurus/synonyms>