The best replacement for curtain is shower door.

The best alternatives to curtain are rated as following:
★★★★★  shower door
★★★★★  drape
★★★  door
★★  drapes
★★  certain
★  glass shower doors
★  blinds for patio doors
★  rollover method
★  rollover
★  glass door
★  roller blind
★  blind for sliding glass door
★  liner
★  closet door
  blind
  shower doors
  doors
  shower curtain liner
  drapery
  valance
  shutter
  drape fabric
  glass shower enclosure
  shower liner

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

Other search terms related to curtain and their ratings are:
★★★★★ valance
★★ matching window curtain
tub
You have in mind a companion for curtain and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of curtain in all years. Click on graph for more.
curtain
shower door
drape