Synonyms and related words :
O, annular muscle, annulus, anthelion, antisun, areola, aura, chaplet, circle, circuit, circumference, circus, closed circle, corona, coronet, countersun, crown, cycle, diadem, discus, disk, eternal return, fairy ring, garland, glory, halo, lasso, logical circle, loop, looplet, lunar corona, lunar halo, magic circle, mock moon, mock sun, moon dog, nimbus, noose, orbit, paraselene, parhelic circle, parhelion, radius, rainbow, ring, rondelle, round, roundel, saucer, solar corona, solar halo, sphincter, sun dog, vicious circle, wheel, wreath,