Moulding, or molding, also coving, is a strip of material with various profiles used to cover transitions between surfaces or for decoration. It is traditionally made from solid milled wood or plaster, but may be of plastic or reformed wood. In classical architecture and sculpture, the moulding is often carved in marble or other stones. In historic architecture, and some expensive modern buildings, it may be formed in place with plaster.
Decorative plaster mouldings and coving in a late Victorian town house in South Wales.
Moldings from 1728 Table of architecture in the Cyclopedia
Millwork is historically any wood mill produced decorative materials used in building construction. Stock profiled and patterned millwork building components fabricated by milling at a planing mill can usually be installed with minimal alteration. Today, millwork may encompass items that are made using alternatives to wood, including synthetics, plastics, and wood-adhesive composites.
Traditional interior millwork examples: note the wall covers, as well as the door and window trim, are all custom-styled to complement the central focus point of the room—the fireplace mantle.
Cabinetry and casework
Ceiling trims, embellishments, beams, and extensions
Chair rails