Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

sphericity, spheroidity†; globosity†. cylinder, cylindroid†, cylindrical; barrel, drum; roll, roller; rouleau†, column, rolling-pin, rundle. cone, conoid†; pear shape, egg shape, bell shape. sphere, globe, ball, boulder, bowlder†; spheroid, ellipsoid; oblong spheroid; oblate spheroid, prolate spheroid; drop, spherule, globule, vesicle, bulb, bullet, pellet, pelote†, clew, pill, marble, pea, knob, pommel, horn; knot (convolution) 248. curved surface, hypersphere; hyperdimensional surface. V. render spherical &c adj.; form into a sphere, sphere, roll into a ball; give rotundity &c n.; round. Adj. rotund; round &c (circular) 247; cylindric, cylindrical, cylindroid†; columnar, lumbriciform†; conic, conical; spherical, spheroidal; globular, globated†, globous†, globose; egg shaped, bell shaped, pear shaped; ovoid, oviform; gibbous; rixiform†; campaniform†, campanulate†, campaniliform†; fungiform†, bead-like, moniliform†, pyriform†, bulbous; tres atque rotundus [Lat.]; round as an orange, round as an apple, round as a ball, round as a billiard ball, round as a cannon ball.