air bubble, bag, ball, balloon, bleb, blister, blob, blood blister, boll, bolus, bubble, bulb, bulbil, bulblet, bulla, cap and bells, coxcomb, ellipsoid, fever blister, fob, geoid, globe, globelet, globoid, globule, glomerulus, gob, gobbet, knob, knot, motley, oblate spheroid, orb, orbit, orblet, pellet, pocket, poke, prolate spheroid, rondure, sac, sack, slapstick, soap bubble, sock, sphere, spheroid, spherule, vesicle