THESAURUS
chaps
bazoo, chops, embouchure, gab, gob, jaw, jaws, jowls, kisser, lips, mandibles, maw, maxilla, mouth, mug, mush, muzzle, oral cavity, premaxilla, trap, yap
ROGET THESAURUS
chaps
Edge
N
edge, verge, brink, brow, brim, margin, border, confine, skirt, rim, flange, side, mouth, jaws, chops,
chaps, fauces, lip, muzzle, threshold, door, porch, portal, coast, shore, frame, fringe, flounce, frill, list, trimming, edging, skirting, hem, selvedge, welt, furbelow, valance, gimp, border, marginal, skirting, labial, labiated, marginated.