There are several synonyms for the term "nut-shaped," including round, spherical, oval, ellipsoid, globular, and bulbous. These words all describe a shape that is roughly similar to that of a nut, with a rounded or curved exterior that tapers at the ends. "Round" specifically refers to a shape that is equally circular in all directions, while "spherical" implies a three-dimensional shape that is perfectly round. "Oval" and "ellipsoid" both describe a shape that is elongated in one direction relative to its perpendicular axis, while "globular" suggests a rounded shape that is slightly flattened or lumpy. "Bulbous" can connote a similar shape with a more exaggerated curvature or protuberance.