Synonyms|101Antonyms|1|Broader|0Narrower|0Related|10

70 entries under underground topic. ×

0
on the QT(expression, idiom, clandestine, undisclosed)
0
out-of-the-way(clandestine, undisclosed)
0
private(secret, clandestine, undisclosed)
0
recondite(clandestine, undisclosed)
0
reticent(clandestine, undisclosed)
0
retired(clandestine, undisclosed)
0
secluded(clandestine, undisclosed)
0
secretive(clandestine, undisclosed)
0
shrouded(clandestine, undisclosed)
0
sly(clandestine, undisclosed)
0
sneak(clandestine, undisclosed)
0
sneaky(clandestine, undisclosed)
0
stealthy(clandestine, undisclosed)
0
strange(clandestine, undisclosed)
0
sub-rosa(secret, clandestine, undisclosed)
0
surreptitious(secret, clandestine, undisclosed)
0
top secret(expression, secret, clandestine, undisclosed)
0
unacknowledged(clandestine, undisclosed)
0
under-the-table(secret, clandestine, undisclosed)
0
under false pretense(expression, idiom, clandestine, undisclosed)
For more, visit Top-secret on Power Thesaurus
11 years ago|761 views|share |citing 
APASmart Define. (2015). top-secret thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/top-secret/thesaurus/synonyms
ChicagoSmart Define. 2015. "top-secret thesaurus" https://smartdefine.org/top-secret/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, top-secret thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/top-secret/thesaurus/synonyms>.
MLASmart Define. "top-secret thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/top-secret/thesaurus/synonyms>