S: (n) spheroid, ellipsoid of revolution (a shape that is generated by rotating an ellipse around one of its axes) "it looked like a sphere but on closer examination I saw it was really a spheroid"
S: (n) sphere (a three-dimensional closed surface such that every point on the surface is equidistant from the center)
S: (n) sphere (a solid figure bounded by a spherical surface (including the space it encloses))