abri
air-raid shelter
airtight secrecy
asylum
bolt-hole
bomb shelter
bombproof
bunker
cache
cave
close secrecy
closeness
corner
cover
covert
coverture
cranny
crypticness
cubby
cubbyhole
cyclone cellar
dark corner
den
disappearance
discreetness
discretion
dugout
earth
evasion
evasiveness
fallout shelter
foxhole
funk hole
hiddenness
hideaway
hideout
hidey hole
hiding
hiding place
hole
hugger-mugger
hugger-muggery
immateriality
imperceptibility
indiscernibility
invisibility
lair
niche
nonappearance
artifice
avoidance
camouflage
compromise
deception
disguise
disobedience
dissimulation
duplicity
fraud
manipulation
misrepresentation
privacy
restraint
reticence
seclusion
secrecy
stealth
suppression
treachery
trickery