The best replacement for locks is dreads.

The best alternatives to locks are rated as following:
★★★★★  dreads
★★★★  sisterlocks
★★★★  dreadlocks
★★★★  semaphores
★★★  latches
★★  monitors
★★  nappy locks
★★  headkandy
★  luxy
★  master locks
★  saline locks
★  electric strikes
★  luxy hair
★  sister locks
★  schlage
★  twist
  twists
  cylindrical locks
  mechanical locks
  luxy extensions
  rekey
  kwikset locks
  mages
  schlage locks
  spin locks
  traditional locs
  kryptonite
  heparin locks
  rekeying
  smoked salmon
  key locks
  traditional locks

Your alternative for locks is not listed? Suggest!
Speaking about locks, one probably shouldn't forget about keys.

Other search terms related to locks and their ratings are:
★★★★★ keys
★★ alarms
★★ round keys
★ key
magnetic keys
bump keys
non duplicating keys
You have in mind a companion for locks and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of locks in all years. Click on graph for more.
locks
dreads
sisterlocks