amorphous, asymmetrical, bisect, bulbous, circumference, concave, concentric, concertina, contour, convex, corrugated, crack, crescent, crest, crevice, crooked, dilate, divot, ellipse, elongate, granular, helix, imprint, level, morph, obverse, orbicular, polygon, polyhedron, protrude, protrusion, protuberance, quadrant, radius, serpentine, sinuous, slanted, slit, spike, supine, tortuous, turgid, twist, warp