The best replacement for unique is distinct.

The best alternatives to unique are rated as following:
★★★★★  distinct
★★★★★  primary key
★★★  bullseye
★★★  an unique
★★★  distinct oracle
★★★  distinctive
★★★  universal
★★★  orderly
★★  power pistol
★★  primary key mysql
★  unique
★  new visitors
★  unusual
★  null constraint
★  titegroup
★  distinct sql
★  blue dot
★  bullseye powder
★  231
★  unique equipped
  primary key oracle
  original
  cocktail
  universal powder
  an unique grammar
  red dot
  valuable
  very unique
  index mysql
  primary key sql
  herco
  universal clays
  weird

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

Other search terms related to unique and their ratings are:
★★★★★ charice
★★ 44 mag
You have in mind a companion for unique and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of unique in all years. Click on graph for more.
unique
distinct
primary key