46 entries under underground topic. ×

1
dissimulated(close, clandestine, undisclosed)
1
enigmatical(obscure, strange, unknown, clandestine)
1
inside(close, clandestine, undisclosed)
1
mystic(obscure, unknown, clandestine, undisclosed)
1
obscure(strange, unknown, clandestine, undisclosed)
1
shrouded(obscure, secret, unknown, hidden, clandestine)
1
strange(obscure, unknown, clandestine, undisclosed)
1
top secret(expression, close, clandestine, undisclosed)
1
unacknowledged(close, clandestine, undisclosed)
1
under false pretense(expression, idiom, close, clandestine)
0
ambiguous(obscure, unknown, clandestine, undisclosed)
0
buried(secret, hidden, clandestine, underhanded)
0
clouded(obscure, unknown, clandestine, undisclosed)
0
covered(obscure, unknown, clandestine, undisclosed)
0
deep(obscure, unknown, clandestine, undisclosed)
0
obscured(secret, hidden, clandestine, underhanded)
0
out-of-the-way(obscure, unknown, clandestine, undisclosed)
0
secluded(obscure, unknown, clandestine, undisclosed)
0
top-secret(clandestine, undisclosed)
0
undisclosed(obscure, unknown, clandestine, unrevealed)
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APASmart Define. (2015). furtive thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/furtive/thesaurus/synonyms
ChicagoSmart Define. 2015. "furtive thesaurus" https://smartdefine.org/furtive/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, furtive thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/furtive/thesaurus/synonyms>.
MLASmart Define. "furtive thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/furtive/thesaurus/synonyms>