curved shape vs arc

Other hyponyms of curved shape include bell-shaped curve, Gaussian curve, Gaussian shape, normal curve, meander, closed curve, S-shape, catenary, Cupid's bow, undulation, wave, extrados, gooseneck, intrados, bend, crook, turn, twist, crotchet, hook, envelope, crenation, crenature, crenel, crenelle, scallop, spiral, helix, spiral, perversion, sinuosity, sinuousness, arch, bell, bell shape, campana, bow, crescent, quadric, quadric surface, lemniscate, line roulette, roulette, pedal curve, indifference curve, demand curve, polygonal chain, conchoid, brachistochrone, supply curve, cosine curve, cotangent curve, tangent curve.