curtain
Formal drapery placed in front of a window, often composed of several layers of curtains.
tassel 
Decorative end of a cord tieback.
cord tieback 
Plaited rope serving as a tieback.
draw drapery 
Piece of decorative fabric sliding in front of a window to filter or block the light and provide privacy.
cornice 
Strip of fabric affixed to rigid canvas or cardboard; it covers and hides the curtain rod.
sheer curtain 
Curtain made of a light fabric that filters the light entering a room.
holdback 
Part attached to the wall for hooking the tieback.
overdrapery 
Curtain covering another curtain.