The best replacement for x is y.

The best alternatives to x are rated as following:
★★★★★  y
★★  y axis
★★  y chromosome
★★  y pokemon
★★  y graph
★  zero
★  droid incredible
★  y which axis
★  y first
★  x bar
★  y sperm
★  xp
★  vista
★  incredible
★  iphone
★  droid 2
★  linux
  windows xp
  molly
  generation y
  martin luther king
  windows vista
  y intercept
  iphone 5s
  iphone 4
  y suspenders
  theory y
  droid x2
  rubicon
  windows
  y generation
  x++
  x
  htc one
  y plot
  galaxy s4
  y graphs
  galaxy s3
  y chromosomes
  windows 7
  y theory
  iphone 4s
  nibiru
  wayland
  y variable
  samsung fascinate
  y chart
  os x server
  opengl
  ubuntu
  martin luther king jr
  mac os 9
  megaman
  htc incredible
  evo
  os 9

Your alternative for x is not listed? Suggest!
Speaking about x, one probably shouldn't forget about window manager.

Other search terms related to x and their ratings are:
★★★★★ window manager
★★★★ four dots
★★ fractions
★★ paying mana cost
★★ vmware
★★ boot camp
★★ animals
★ os 9
maalox
You have in mind a companion for x and it is not yet here? Propose!



Google Trends

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x
y
y axis