What is another word for curtain?

There are many words that could be used depending on the context:

Formal:

* Drapery

* Hangings

* Valance

* Panel

* Screen

Informal:

* Covering

* Shade

* Blind

* Window treatment

* Fabric

Specific types:

* Sheer

* Voile

* Lace

* Velvet

* Brocade

* Damask

* Tulle

Literary:

* Veil

* Mantle

* Shroud

* Drape

The best word to use will depend on the specific situation and the desired tone.