3d
bank
box
business
cell
combination
confidential
copy
currency
deposit
depository
door
economy
empty
finance
financial
fraud
fund
gym
inside
investing
investment
keyhole
lock
locker
money
open
privacy
protect
protection
rendering
robbery
safe
safety
save
saving
savings
secrecy
secret
secure
security
space
steel
storage
strongbox
treasure
trust
unlocked
vault
vaulted