Final answer:
The vertical side members of raised panel wood doors are called stiles, and they provide structural support to the panels within the door's frame.
Step-by-step explanation:
The vertical side members of raised panel wood doors are known as stiles. Stiles run vertically along the sides of the door and are an essential component in the door's construction, providing structural support to the panels that fill the door's frame.
Various design details, including raised panels, can be incorporated within the frame that's bordered by the stiles.
In architectural woodworking, the stile is a fundamental element, much like mullions which are slender, vertical forms separating windows, as mentioned by Steven referring to the delicate masonry in Gothic architecture.
Raised panel wood doors have vertical side members called jamb figures. These are attached to the door jambs and often feature decorative elements such as carvings or sculptures. Jamb figures are an important architectural feature that adds visual interest and craftsmanship to the doors.