1. Emergency stash of money

Encyclopedia: Mad money

• lock in
• lock washer
• lock-gate
• lock-up option
• lockable
• lockage
• lockbox
• lockdown
• Locke
• locker
• locker room
• locket
• locking
• locking pliers
• lockjaw
• lockkeeper
• lockman
• lockmaster
• locknut
• lockout
• lockram
• lockring
• locksmith
• lockstep
• lockstitch