Synonyms and related words :
O, ambit, annular muscle, annulus, areola, aureole, border, boundaries, boundary, bounds, bourns, chaplet, circle, circuit, circumscription, circus, closed circle, compass, confines, coordinates, corona, coronet, cortex, covering, crown, crust, cycle, diadem, discus, disk, edges, envelope, epidermis, eternal return, exterior, external, facade, face, facet, fairy ring, fringe, fringes, front, garland, glory, halo, integument, lasso, limitations, limits, lineaments, logical circle, loop, looplet, magic circle, marches, margin, metes, metes and bounds, noose, orbit, outer face, outer layer, outer side, outer skin, outline, outlines, outside, outskirts, pale, parameters, perimeter, periphery, radius, rim, rind, ring, rondelle, round, roundel, saucer, shell, skin, skirts, sphincter, superficies, superstratum, surface, top, verges, vicious circle, wheel, wreath