68 entries under adjective topic. ×

2
intelligence(secret, hidden, spy, covert)
2
mystical(secret, unknown, hidden, underground)
2
on the QT(expression, idiom, adverb, dishonest)
2
sub-rosa(dishonest, cunning, deceitful, secret)
2
under cover(expression, adverb, sly, clandestine)
1
deep(clandestine, underground, undisclosed)
1
individual
1
irregular
1
jumbled
1
personal
1
unavowed
0
abnormal
0
analytical
0
atypical
0
classified(secret, clandestine, underground, undisclosed)
0
eccentric
0
eerie
0
erratic
0
exploratory
0
huggermugger
11 years ago|6.9k views|share |citing 
APASmart Define. (2015). undercover thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms
ChicagoSmart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, undercover thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>.
MLASmart Define. "undercover thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms>