adytum
ashram
asylum
bolt-hole
cache
cell
cloister
concealment
corner
cover
covert
coverture
cranny
cubby
cubbyhole
dark corner
den
dugout
foxhole
funk hole
haven
hermitage
hideaway
hidey hole
hiding
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hole
holy of holies
ivory tower
lair
mew
niche
nook
privacy
recess
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retreat
rock pile
sanctuary
sanctum
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secret place
shelter
stash
undercovert
earth
hole up
hunker down
lie low
stowaway
hainanese
hehe
hkholiday
money-laundering
sneakin