THESAURUS
diadem
O, anklet, annular muscle, annulus, areola, armlet, aureole, bangle, beads, bijou, bracelet, breastpin, brooch, cap of dignity, cap of maintenance, chain, chaplet, charm, chatelaine, circle, circuit, circumference, circus, closed circle, corona, coronet, crown, cycle, discus, disk, earring, ermine, eternal return, fairy ring, fob, garland, gem, glory, great seal, halo, jewel, lasso, locket, logical circle, loop, looplet, magic circle, necklace, noose, nose ring, orb, orbit, pin, precious stone, privy seal, purple, purple pall, radius, regalia, rhinestone, ring, robe of state, rod, rod of empire, rondelle, round, roundel, royal crown, saucer, scepter, seal, signet, sphincter, stickpin, stone, tiara, torque, triple plume, uraeus, vicious circle, wampum, wheel, wreath, wristband, wristlet
ROGET THESAURUS
diadem
Scepter
N
scepter, regalia, caduceus, Mercury's rod, Mercury's staff, Mercury's wand, rod of empire, mace, fasces, wand, staff, staff of office, baton, truncheon, flag, ensign of authority, emblem of authority, badge of authority, insignia of authority, throne, chair, musnud, divan, dais, woolsack, toga, pall, mantle, robes of state, ermine, purple, crown, coronet,
diadem, tiara, cap of maintenance, decoration, title, portfolio, key, signet, seals, talisman, helm, reins.