RichThesaurus
under the radar
under the radar
synonyms
on the sly
clandestine
surreptitious
incognito
furtive
confidential
inconspicuous
secretive
cloak-and-dagger
behind the scenes
disguised
off-the-books
under-the-table
underground
concealed
sly
lurky
sneaky
hush-hush
covert
stealthy
low profile
abstruse
lurksome
secret
under wraps
sub rosa
dern
undercover
obfuscated
off the radar
catlike
slinky
huggermugger
on the down-low
behind someone's back
under the table
in secret
behind closed doors
in confidence
under the radar
antonyms
on the radar