RichThesaurus
under cover
under cover
synonyms
secretly
covertly
on the quiet
behind someone's back
under the counter
in secret
on the side
furtively
on the sly
stealthily
on the q.t.
clandestinely
unobserved
sub rosa
without anyone knowing
quietly
privily
behind closed doors
slyly
behind the scenes
incognito
surreptitiously
in private
discreetly
sneakily
in confidence
confidentially
in disguise
in camera
conspiratorially
privately
hidden
under wraps
enigmatic
unrecognizable
personal
undivulged
obscure
undisclosed
with one's identity concealed
within doors
guarded
incog
within walls
equivocal
under a false name
under an assumed name
unexpressed
unsaid
indoors
more synonyms
under cover
antonyms
openly
known
publicly
overt
expressed
exterior
outside
public