Synonyms|358Antonyms|72|Broader|2Narrower|0Related|322

50 entries under underground topic. ×

1
abstruse(secret, unknown, hidden, concealed)
1
backdoor(clandestine, undisclosed)
1
camouflaged(secret, hidden, clandestine, undisclosed)
1
clouded(secret, unknown, hidden, concealed)
1
covered(secret, unknown, hidden, concealed)
1
discreet(clandestine, undisclosed)
1
dissembled(secret, hidden, clandestine, undisclosed)
1
dissimulated(clandestine, undisclosed)
1
incognito(secret, hidden, spy, clandestine)
1
obscure(secret, unknown, hidden, concealed)
1
recondite(secret, unknown, hidden, concealed)
1
top secret(expression, idiom, clandestine, undisclosed)
1
unacknowledged(clandestine, undisclosed)
1
under false pretense(expression, idiom, clandestine, undisclosed)
1
unknown(secret, hidden, clandestine, concealed)
0
arcane(clandestine, undisclosed)
0
deep(clandestine, undisclosed)
0
enigmatical(clandestine, undisclosed)
0
obscured(secret, hidden, clandestine, concealed)
0
out-of-the-way(clandestine, undisclosed)
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APASmart Define. (2015). surreptitious thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/surreptitious/thesaurus/synonyms
ChicagoSmart Define. 2015. "surreptitious thesaurus" https://smartdefine.org/surreptitious/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, surreptitious thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/surreptitious/thesaurus/synonyms>.
MLASmart Define. "surreptitious thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/surreptitious/thesaurus/synonyms>