The best replacement for tower is desktop.

The best alternatives to tower are rated as following:
★★★★★  desktop
★★★★★  all in one
★★★★  full tower
★★★★  chiller
★★★★  mid tower
★★★  building
★★★  sourcetree
★★★  empire state building
★★★  gitx
★★★  bookshelf
★★★  world trade center
★★★  twin towers
★★  all in one computer
★★  smartgit
★★  rack server
★★  mini tower
★  pisa
★  gitbox
★  sears tower
★  washington monument
★  approach
★  pyramid luxor
★  west wing mgm grand
★  south tower
★  eiffel tower
★  scythe infinity
★  fluid cooler
★  one world trade center
★  john hancock
★  all in one pc
★  dragon
★  zalman 9700
★  tokyo tower
★  turret
  freedom tower
  sky tree
  space needle
  john hancock building
  tower
  kitchen helper
  small form factor
  beach tower
  hancock
  pyramid
  sky tower

Your alternative for tower is not listed? Suggest!
Speaking about tower, one probably shouldn't forget about one piece of paper.

Other search terms related to tower and their ratings are:
★★★★★ one piece of paper
★★★ roller coaster on top
★★★ bimini
You have in mind a companion for tower and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tower in all years. Click on graph for more.
tower
desktop
all in one