Same word as zodiac:

amphitheater, aureole, band, belt, bowl, bracelet, circlet, circuit, circumference, circus, cirque, coil, colure, compass, cordon, corona, crown, cycle, disc, disk, ecliptic, enclosure, equator, full turn, globe, halo, hoop, horizon, lap, meridian, orbit, parallel of latitude, perimeter, periphery, record, revolution, ring, ringlet, round, sphere, stadium, tire, turn, vortex, wheel, wreath, zodiac