RichThesaurus
covertly
covertly
synonyms
furtively
secretly
surreptitiously
slyly
on the sly
stealthily
clandestinely
sub rosa
on the quiet
in secret
privately
behind someone's back
under cover
confidentially
under the counter
in confidence
behind closed doors
in camera
on the q.t.
on the side
sneakily
quietly
unobserved
privily
discreetly
behind the scenes
on the QT
sidelong
conspiratorially
personally
askance
sideways
indirectly
obliquely
in holes and corners
hush-hush
in private
by stealth
without anyone knowing
off the record
incognito
don’t breathe a word
off the cuff
out of the corner of one's eye
underhandedly
darkly
under a false name
under wraps
in strict confidence
with one's identity concealed
more synonyms
covertly
antonyms
openly
publicly
overtly
frankly
honestly
familiarly
candidly
commonly