aduncity, alveolation, alveolus, antrum, aquilinity, arching, arcuation, armpit, basin, boss, bowl, bump, cavity, circularity, colophon, concameration, concave, convexity, convolution, crater, crookedness, crypt, cup, curvation, curvature, curving, curvity, dactylogram, dactylograph, de-escalation, debasement, decurvation, decurvature, degradation, demotion, dent, depression, descent, detrusion, diminution, dint, dip, ducking, embossment, excrescence, excurvation, excurvature, fingerprint, fold, follicle, footmark, footprint, footstep, fossil footprint, funnel chest, hauling down, hole, hollow, hollow shell, hollowness, hookedness, ichnite, ichnolite, impress, impression, imprint, incurvation, incurvature, incurvity, indent, indentation, indention, lacuna, lowering, lump, pad, paw print, pawmark, pimple, pit, pocket, print, pug, pugmark, punch bowl, recurvation, recurvature, recurvity, reduction, rondure, rotundity, sag, scoop, seal, shell, sigil, signet, sink, sinkage, sinkhole, sinking, sinuosity, sinuousness, sinus, socket, stamp, step, stud, submergence, thrusting under, thumbmark, thumbprint, tortuosity, tortuousness, trough, vaulting, vestige, vug