secret
keep from
keep a lid on
cryptadia
stall
let the cat out of the bag
tick a lock
concealment
hush up
keep quiet
sub rosa
darkness
concealing
hiding
out
keep one's lips sealed
spill the beans
under wraps
sensitive
secernent
feign
oversecrete
under the covers
on the down-low
secretively
on the hush
underwrapped
lie low
concealedly
secrete
lean
secrecy
closehandedness
disembosom
conceal
keep shady
crypto-
mum
secretiveness
silence
clandestinely
hidness
cloakedly
make known
privily
off-the-record
crypto
closet
hiddle
secretive
under one's hat
backstage
in secret
behind the scenes
on the Q.T.
secretly
closehanded
something nasty in the woodshed
on the QT
occulted
subterranean
confess
confidentiality
semisecrecy
abscond
unconceal
cover up
hypersecrete
uncover
underhanded
under the rose
hugger-mugger
covert
undisclosedly
keep
shadow
dark
covertly
kabbalistic
qabalistic
exposure
semisecret
cabalistic
cryptic
cryptical
sibylline
classify
semisecretly
hypersecretory