O, annular muscle, annulus, areola, aureole, bag, bait, birdlime, bola, catch, chaplet, circle, circuit, circumference, circus, closed circle, cobweb, corona, coronet, crown, cycle, diadem, discus, disk, dragnet, enmesh, ensnare, entangle, entrap, eternal return, fairy ring, fishhook, fly, foul, garland, gill net, glory, ground bait, halo, harpoon, hook, jig, land, lariat, lime, logical circle, loop, looplet, lure, magic circle, mesh, meshes, nail, net, noose, orbit, plug, pound net, purse seine, radius, ring, rondelle, rope, round, roundel, sack, saucer, seine, snag, snare, sniggle, spear, sphincter, spinner, springe, squid, take, tangle, tangle up with, toils, trap, trawl, vicious circle, wheel, wobbler, wreath