List of external synonyms and external related words.
alien, apparent, border, circumference, cortex, cortical, covering, crust, envelope, epidermic, epidermis, exomorphic, exotic, exterior, extraneous, extraorganismal, extrinsic, facade, face, facet, foreign, fringe, front, impersonal, integument, lineaments, nonsubjective, objective, open, out, outer, outer face, outer layer, outer side, outer skin, outermost, outline, outlying, outmost, outside, outstanding, outward, outward-facing, over, perceptible, peripheral, periphery, public, rind, roundabout, seeming, shell, skin, superficial, superficies, superstratum, surface, top, visible