2
unforeseen
2
unheard
2
unidentified
2
unprecedented(adjective, unknown)
1
QT(secret, hidden, clandestine, underground, underhanded)
1
accredited
1
anonymous
1
cloaked(secret, hidden, clandestine, underground, underhanded)
1
covert(adjective, clandestine, underhanded)
1
credited
1
disguised(secret, hidden, clandestine, underground, underhanded)
1
dissembled(secret, hidden, clandestine, underground, underhanded)
1
enigmatic
1
impenetrable
1
incalculable
1
incog(secret, hidden, clandestine, underground, underhanded)
1
incognizable
1
indiscoverable
1
obscure
1
putative
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APASmart Define. (2015). unsuspected thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unsuspected/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsuspected thesaurus" https://smartdefine.org/unsuspected/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unsuspected thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unsuspected/thesaurus/synonyms>.
MLASmart Define. "unsuspected thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unsuspected/thesaurus/synonyms>