0
pop-up
0
privy
0
quiet
0
restricted(clandestine, underground, undisclosed)
0
secluded(obscure, unknown, clandestine, underground, undisclosed)
0
sneak(clandestine, underground, undisclosed)
0
sneaky(clandestine, underground, undisclosed)
0
spontaneous
0
strange(obscure, deep, unknown, clandestine, underground)
0
sub-rosa(clandestine, underground, undisclosed)
0
surprise
0
top-secret(clandestine, underground, undisclosed)
0
top secret(expression, clandestine, underground, undisclosed)
0
unacknowledged(clandestine, underground, undisclosed)
0
unannounced(adjective, disclosed)
0
uncirculated
0
under-the-table(clandestine, underground, undisclosed)
0
under false pretense(expression, idiom, clandestine, underground, undisclosed)
0
under wraps(expression, clandestine, underground, undisclosed)
0
undercover(clandestine, underground, undisclosed)
11 years ago|1.6k views|share |citing 
APASmart Define. (2015). unpublished thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unpublished/thesaurus/synonyms
ChicagoSmart Define. 2015. "unpublished thesaurus" https://smartdefine.org/unpublished/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unpublished thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unpublished/thesaurus/synonyms>.
MLASmart Define. "unpublished thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unpublished/thesaurus/synonyms>