3
brake
3
bushes
3
chaparral
3
classified(adjective, secret, clandestine, underground, undisclosed)
3
coppice
3
dormant
3
hideout(noun, cover, protection, shelter, security)
3
hiding
3
muffled
3
mystic(secret, unknown, hidden, concealed, unseen)
3
mystical(strange, secret, unknown, hidden, curious)
3
restricted(adjective, secret, clandestine, underground, undisclosed)
3
unapparent(adjective, invisible, latent)
3
unexposed(adjective, latent)
3
unobservable(adjective, invisible, latent)
3
unseeable
2
allusive
2
anonymous(adjective, concealed)
2
back
2
back-door
11 years ago|17k views|share |citing 
APASmart Define. (2015). covert thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/covert/thesaurus/synonyms
ChicagoSmart Define. 2015. "covert thesaurus" https://smartdefine.org/covert/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, covert thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/covert/thesaurus/synonyms>.
MLASmart Define. "covert thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/covert/thesaurus/synonyms>