Read from point to pommel, the parts makers name on a fixed blade include the blade's point, edge, spine, ricasso and choil, then the guard, the handle and the tang it is secured on, and the pommel. Kershaw's anatomy page, written for pocketknives, supplies the blade words; the guard, tang and pommel come from Buck's and Böker's pages about their own knives.
The blade's words come from Kershaw's anatomy page, which Kershaw titles for pocketknives, so each definition below is Kershaw's, read from the point back; the folder's own parts are listed in the pocket knife parts answer.
A guard behind the blade and a pommel at the butt are fittings Buck writes as a pair and Böker also names; Case lists an aluminum guard on its Mini FINN Hunter, and the makers' words for both are gathered under guard and pommel.
Inside the handle runs the tang. Buck says fixed blades "can have tang or full-tang construction at the handle end," and Böker says a full tang knife's single piece of steel "extends from the point of the blade to the butt of the handle"; how the two constructions compare has its own answer, full tang vs partial tang.
Buck says "handle slabs" are attached on either side of a full tang, Böker writes "handle scales," and Gerber's Terracraft page lists "Machined G-10 scales." Böker says "The lanyard hole is used to attach a strap or loop."
The sheath is a separate item in the makers' own lists: CIVIVI's spec list for its Cloud Peak gives it a line of its own, "Sheath: Brown Leather Sheath," and the materials makers list for sheaths are taken up in leather, nylon or Kydex: how sheaths differ.
The Buck General Fixed Blade Phenolic lists a 7.38 in blade of 420HC stainless, and its description pairs a "Black Phenolic handle" with an "aluminum guard and pommel" and adds a "Black leather belt sheath."
The Buck Alpha Hunter Walnut's listing names no guard or pommel: it gives a walnut handle and a full tang, and it lists a sheath with the knife.