1) Architectural sidepieces 2) Beams in doorways 3) Door beams 4) Door columns 5) Door features 6) Door frame part 7) Door frame parts 8) Door frame pieces 9) Door parts 10) Doorposts 11) Doorway beams 12) Doorway components 13) Doorway parts 14) Doorway posts 15) Doorway side-posts 16) Doorway sides 
The vertical posts that form the sides of a door, window frame, etc.
The vertical sides of wall openings. Also, the vertical posts of frames fixed within an opening.