The best replacement for backdrop is backdraft.

The best alternatives to backdrop are rated as following:
★★★★★  backdraft
★★  coomback
★★  touchstone
★★  muslin
★  backdrop
★  integral setting
★  background
★  integral
★  back drop
  green screen
  paper

Your alternative for backdrop is not listed? Suggest!
Speaking about backdrop, one probably shouldn't forget about red carpet.

Other search terms related to backdrop and their ratings are:
★★★★★ red carpet
You have in mind a companion for backdrop and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of backdrop in all years. Click on graph for more.
backdrop
backdraft
coomback