25 entries under adjective topic. ×

4
secret
3
clandestine(adverb, slyly, underhandedly, surreptitiously)
3
undercover(adverb, clandestine, slyly, underhandedly)
2
confidential
2
mysterious
2
secretive
1
deep
1
furtive
1
invisible
1
mendacious
1
surreptitious
0
arcane
0
cryptic
0
esoteric
0
hole-and-corner
0
latent
0
recondite
0
sensitive
0
shady
0
stealthy
<12>
10 years ago|7k views|share |citing 
APASmart Define. (2016). secretly thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/secretly/thesaurus/synonyms
ChicagoSmart Define. 2016. "secretly thesaurus" https://smartdefine.org/secretly/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, secretly thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/secretly/thesaurus/synonyms>.
MLASmart Define. "secretly thesaurus" 19 February 2016. Web. 25 September 2026. <https://smartdefine.org/secretly/thesaurus/synonyms>