is a specific kind of: form, shape.

is a broader term that covers: bulb | cone, cone shape, conoid | disc, disk, saucer | coil, curl, curlicue, gyre, ringlet, roll, scroll, whorl | convolution, swirl, vortex, whirl | ellipsoid of revolution, spheroid | sphere | sphere | cylinder | toroid, torus | rim ... show more.