The best replacement for cover is concealment.

The best alternatives to cover are rated as following:
★★★★★  concealment
★★★★  comforter
★★★  bare minerals
★★  original
★★  bare escentuals
★★  plume fossil
★  title page
★  bare essentials
★  remix
★  text paper
★  type cover
★  skin
  aviate
  remake
  land use
  mulch
  bareminerals
  contain
  duvet cover
  touch cover
  coverlet
  card stock
  smart case
  solar sun rings
  lawn
  soft cover
  solar rings
  application letter
  pur minerals
  bare mineral
  duvet
  solid
  paperback
  pergola
  understudy
  new ipad cover
  ipad case
  bumper
  advance
  arrangement
  sleeve
  mattress pad
  clear solar cover
  tribute

Your alternative for cover is not listed? Suggest!
Speaking about cover, one probably shouldn't forget about keyboard for ipad.

Other search terms related to cover and their ratings are:
★★★★★ keyboard for ipad
★★★ duvet
★ stand
critical illness
foam
water bags
You have in mind a companion for cover and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cover in all years. Click on graph for more.
cover
concealment
comforter