Head rail, also known as a track or top rail, is an essential element of curtains, blinds, and drapes, offering support for the window treatment and allowing for smooth movement. There are plenty of synonyms for the term head rail used in the decor and design industry. These include valance board, pelmet, cornice, eaves board, fascia, header, headpiece, and crown moulding. Valance board is a decorative board that covers the upper part of the window, while pelmet is a similar structure made of fabric. Cornice and eaves board are architectural moldings that can be used both indoors and outdoors, providing a decorative and functional touch. Fascia is a flat board that covers the ends of the rafters, and header, headpiece, and crown molding are decorative elements placed above the window to add a luxurious touch.