It depends on where you are. Most places and people interchange the two terms. From what I have seen Drapes are typically the lined nicer fabric that drapes from a rod to the floor and are considered more formal. Curtains can go anywhere, like above the sink in the kitchen, and are considered more casual.
The primary difference between drapes and curtains is the material they are made from. Drapes are made of a heavier material than traditional curtains.
Cotton drapes or curtains would be best for a person with allergies.
drapes
There are several UK department stores that stock curtains and drapes. Some of these stores include Montgomery Curtains, Paul Simon Curtains, and House of Fraser.
Could be any room - Drapes are curtains over the window
Many popular stores sell drapes and curtains. Pottery Barn, Bed, Bath and Beyond, Walmart, Sears, JC Penney, Macy's and host of other merchants both on and off line sell drapes and curtains.
Curtains/Drapes, can be made from cotton, linen, or wool.
Cotton drapes that are treated to be stain resistant will be the easies too keep clean.
Depending on the window type,drapes alone can be enough.
If the curtains and the drape are in the same colours, or contains the same patterns - yes, they match.
There are a few stores that specialize in customized curtains and drapes. Some of these stores include Victory Blind, Drape Style and Drapery Toronto.
Curtains are pieces of material that cover a window that form a screen. Curtains are also known as drapery or drapes.
One place you can order custom drapes and curtains for your RV is Homespun Fabrics and Draperies. You can find them online at http://www.homespunfabrics.com/ or give them a call at (805) 642-1152.