Synonyms|110Antonyms|3|Broader|1Narrower|0Related|37

27 entries under adjective topic. ×

3
private(secret, hidden, sneaky, covert)
2
on the QT(expression, idiom, adverb, secret)
2
secret(private, hidden, sneaky, covert)
2
surreptitious(secret, sneaky)
1
clandestine(adverb, secret, private, hidden)
1
covert(secret, private, hidden, sneaky)
1
hidden(secret, private, sneaky, covert)
1
hole-and-corner(secret, private, hidden, fraudulent)
1
hush-hush(adverb, secret, clandestine, quietly)
1
sneaking(secret, private, hidden, fraudulent)
1
sub-rosa(secret, private, hidden, covert)
1
under-the-table(secret, private, hidden, sneaky)
1
under cover(expression, adverb, clandestine, recreant)
1
under wraps(expression, adverb, secret, clandestine)
1
undercover(adverb, secret, private, hidden)
1
underground(unusual, secret, radical, secretive)
0
fraudulent(secret, private, hidden, sneaky)
0
furtive(secret, private, hidden, sneaky)
0
skulking(secret, private, hidden, sneaky)
0
slinking(secret, private, hidden, sneaky)
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APASmart Define. (2015). on the sly thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/on_the_sly/thesaurus/synonyms
ChicagoSmart Define. 2015. "on the sly thesaurus" https://smartdefine.org/on_the_sly/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, on the sly thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/on_the_sly/thesaurus/synonyms>.
MLASmart Define. "on the sly thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/on_the_sly/thesaurus/synonyms>